Vulnerability-Lookup

GHSA-R7C9-7PJQ-HMM8

Vulnerability from github – Published: 2026-05-07 21:30 – Updated: 2026-05-12 16:20

Summary

Postorius is vulnerable to XSS

Details

Postorius through 1.3.13 does not escape HTML in the message subject when rendering it in the Held messages pop-up, as exploited in the wild in May 2026.

Severity ?

7.2 (High)


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

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JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "postorius"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "1.3.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-44742"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-12T16:20:35Z",
    "nvd_published_at": "2026-05-07T19:16:02Z",
    "severity": "HIGH"
  },
  "details": "Postorius through 1.3.13 does not escape HTML in the message subject when rendering it in the Held messages pop-up, as exploited in the wild in May 2026.",
  "id": "GHSA-r7c9-7pjq-hmm8",
  "modified": "2026-05-12T16:20:35Z",
  "published": "2026-05-07T21:30:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44742"
    },
    {
      "type": "PACKAGE",
      "url": "https://gitlab.com/mailman/postorius"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.com/mailman/postorius/-/commit/c4706abd05ba6bcf472fc674b160d3a9d6a4868b"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.com/mailman/postorius/-/issues/620"
    },
    {
      "type": "WEB",
      "url": "https://gitlab.com/mailman/postorius/-/merge_requests/972"
    },
    {
      "type": "WEB",
      "url": "https://www.openwall.com/lists/oss-security/2026/05/07/3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Postorius is vulnerable to XSS"
}

CVE-2026-44742 (GCVE-0-2026-44742)

Vulnerability from cvelistv5 – Published: 2026-05-07 18:09 – Updated: 2026-05-08 06:25

Summary

Postorius through 1.3.13 does not escape HTML in the message subject when rendering it in the Held messages pop-up, as exploited in the wild in May 2026.

Severity ?

7.2 (High)


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

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')

Assigner

mitre

References

4 references

URL	Tags
https://gitlab.com/mailman/postorius/-/commit/c47…
https://gitlab.com/mailman/postorius/-/merge_requ…
https://gitlab.com/mailman/postorius/-/issues/620
https://www.openwall.com/lists/oss-security/2026/…

Impacted products

1 product

Vendor	Product	Version
Postorius project	Postorius	Affected: 0 , ≤ 1.3.13 (semver)

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JSON

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  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-44742",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-07T19:00:12.476643Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-07T19:00:19.149Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "packageURL": "pkg:pypi/postorius",
          "product": "Postorius",
          "vendor": "Postorius project",
          "versions": [
            {
              "lessThanOrEqual": "1.3.13",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:postorius_project:postorius:*:*:*:*:*:*:*:*",
                  "versionEndIncluding": "1.3.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
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        {
          "lang": "en",
          "value": "Postorius through 1.3.13 does not escape HTML in the message subject when rendering it in the Held messages pop-up, as exploited in the wild in May 2026."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
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      ],
      "providerMetadata": {
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          "url": "https://gitlab.com/mailman/postorius/-/commit/c4706abd05ba6bcf472fc674b160d3a9d6a4868b"
        },
        {
          "url": "https://gitlab.com/mailman/postorius/-/merge_requests/972"
        },
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          "url": "https://gitlab.com/mailman/postorius/-/issues/620"
        },
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          "url": "https://www.openwall.com/lists/oss-security/2026/05/07/3"
        }
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      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2026-44742",
    "datePublished": "2026-05-07T18:09:20.069Z",
    "dateReserved": "2026-05-07T18:09:19.497Z",
    "dateUpdated": "2026-05-08T06:25:34.759Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-R7C9-7PJQ-HMM8

CVE-2026-44742 (GCVE-0-2026-44742)

Tags

Sightings

Nomenclature