CVE-2026-54416 (GCVE-0-2026-54416)

Vulnerability from cvelistv5 – Published: 2026-08-05 06:58 – Updated: 2026-08-10 11:44
VLAI
Title
Pluck CMS - Unrestricted File Upload via Missing .php8 Extension in Upload Blacklist
Summary
Pluck CMS through 4.7.21 restricts dangerous file uploads in its admin file-management feature using a fixed blacklist in data/inc/files.php ('.php','php3','php4','php5','php6','php7','phtml','.phtm','.pht','.ph3','.ph4','.ph5','.asp','.cgi','.phar'), checked against the last 4-5 characters of the filename.
Severity
7.2 (High)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 13:26 UTC
CWE
  • CWE-434 - Unrestricted Upload of File with Dangerous Type
Assigner
TuranSec CNA under the redhat root
CNA scorecard C 70/100 over 189 records in the last 180 days details
References
URL Tags
https://github.com/pluck-cms/pluck third-party-advisory
Impacted products
Vendor Product Version CPE status
pluck-cms Pluck CMS Affected: 0 , ≤ 4.7.21 (custom)
guessed Create a notification for this product.
Date Public
2026-08-05 06:58
Credits
Alijonov Alisher
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-54416",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-05T13:26:25.540119Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-05T13:31:13.182Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "Pluck CMS",
          "programFiles": [
            "data/inc/files.php"
          ],
          "vendor": "pluck-cms",
          "versions": [
            {
              "lessThanOrEqual": "4.7.21",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Alijonov Alisher"
        }
      ],
      "datePublic": "2026-08-05T06:58:23.512Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003ePluck CMS through 4.7.21 restricts dangerous file uploads in its admin file-management feature using a fixed blacklist in data/inc/files.php (\u0027.php\u0027,\u0027php3\u0027,\u0027php4\u0027,\u0027php5\u0027,\u0027php6\u0027,\u0027php7\u0027,\u0027phtml\u0027,\u0027.phtm\u0027,\u0027.pht\u0027,\u0027.ph3\u0027,\u0027.ph4\u0027,\u0027.ph5\u0027,\u0027.asp\u0027,\u0027.cgi\u0027,\u0027.phar\u0027), checked against the last 4-5 characters of the filename.\u003c/p\u003e"
            }
          ],
          "value": "Pluck CMS through 4.7.21 restricts dangerous file uploads in its admin file-management feature using a fixed blacklist in data/inc/files.php (\u0027.php\u0027,\u0027php3\u0027,\u0027php4\u0027,\u0027php5\u0027,\u0027php6\u0027,\u0027php7\u0027,\u0027phtml\u0027,\u0027.phtm\u0027,\u0027.pht\u0027,\u0027.ph3\u0027,\u0027.ph4\u0027,\u0027.ph5\u0027,\u0027.asp\u0027,\u0027.cgi\u0027,\u0027.phar\u0027), checked against the last 4-5 characters of the filename."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "value": "HIGH"
            },
            "type": "CVSS_3.1_severity"
          }
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-434",
              "description": "CWE-434 Unrestricted Upload of File with Dangerous Type",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-10T11:44:06.635Z",
        "orgId": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c",
        "shortName": "TuranSec"
      },
      "references": [
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://github.com/pluck-cms/pluck"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Pluck CMS - Unrestricted File Upload via Missing .php8 Extension in Upload Blacklist"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c",
    "assignerShortName": "TuranSec",
    "cveId": "CVE-2026-54416",
    "datePublished": "2026-08-05T06:58:23.512Z",
    "dateReserved": "2026-06-13T16:39:46.122Z",
    "dateUpdated": "2026-08-10T11:44:06.635Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-54416",
      "date": "2026-11-07",
      "epss": "0.00499",
      "percentile": "0.43045"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unknown",
                "product": "Pluck CMS",
                "programFiles": [
                  "data/inc/files.php"
                ],
                "vendor": "pluck-cms",
                "versions": [
                  {
                    "lessThanOrEqual": "4.7.21",
                    "status": "affected",
                    "version": "0",
                    "versionType": "custom"
                  }
                ]
              }
            ],
            "source": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Pluck CMS through 4.7.21 restricts dangerous file uploads in its admin file-management feature using a fixed blacklist in data/inc/files.php (\u0027.php\u0027,\u0027php3\u0027,\u0027php4\u0027,\u0027php5\u0027,\u0027php6\u0027,\u0027php7\u0027,\u0027phtml\u0027,\u0027.phtm\u0027,\u0027.pht\u0027,\u0027.ph3\u0027,\u0027.ph4\u0027,\u0027.ph5\u0027,\u0027.asp\u0027,\u0027.cgi\u0027,\u0027.phar\u0027), checked against the last 4-5 characters of the filename."
          },
          {
            "lang": "es",
            "value": "Pluck CMS hasta la versi\u00f3n 4.7.21 restringe la carga de archivos peligrosos en su funci\u00f3n de gesti\u00f3n de archivos de administrador utilizando una lista negra fija en data/inc/files.php (\u2019.php\u2019,\u2019php3\u2019,\u2019php4\u2019,\u2019php5\u2019,\u2019php6\u2019,\u2019php7\u2019,\u2019phtml\u2019,\u2019.phtm\u2019,\u2019.pht\u2019,\u2019.ph3\u2019,\u2019.ph4\u2019,\u2019.ph5\u2019,\u2019.asp\u2019,\u2019.cgi\u2019,\u2019.phar\u2019), comprobada contra los \u00faltimos 4-5 caracteres del nombre de archivo. La lista negra omite la extensi\u00f3n \u2019.php8\u2019. Un administrador autenticado puede cargar un archivo llamado, por ejemplo, shell.php8, que se almacena sin modificar y, en servidores que ejecutan PHP 8.x, es ejecutado como PHP por el servidor web, lo que resulta en ejecuci\u00f3n remota de c\u00f3digo."
          }
        ],
        "id": "CVE-2026-54416",
        "lastModified": "2026-10-24T16:10:00.153",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.2,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "HIGH",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.2,
              "impactScore": 5.9,
              "source": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2026-54416",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-05T13:26:25.540119Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2026-08-05T08:16:33.637",
        "references": [
          {
            "source": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c",
            "url": "https://github.com/pluck-cms/pluck"
          }
        ],
        "sourceIdentifier": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c",
        "vulnStatus": "Deferred",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-434"
              }
            ],
            "source": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c",
            "type": "Secondary"
          }
        ]
      }
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-54416",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-08-05T13:26:25.540119Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-08-05T13:31:02.690Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unknown",
              "product": "Pluck CMS",
              "programFiles": [
                "data/inc/files.php"
              ],
              "vendor": "pluck-cms",
              "versions": [
                {
                  "lessThanOrEqual": "4.7.21",
                  "status": "affected",
                  "version": "0",
                  "versionType": "custom"
                }
              ]
            }
          ],
          "credits": [
            {
              "lang": "en",
              "type": "finder",
              "value": "Alijonov Alisher"
            }
          ],
          "datePublic": "2026-08-05T06:58:23.512Z",
          "descriptions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cp\u003ePluck CMS through 4.7.21 restricts dangerous file uploads in its admin file-management feature using a fixed blacklist in data/inc/files.php (\u0027.php\u0027,\u0027php3\u0027,\u0027php4\u0027,\u0027php5\u0027,\u0027php6\u0027,\u0027php7\u0027,\u0027phtml\u0027,\u0027.phtm\u0027,\u0027.pht\u0027,\u0027.ph3\u0027,\u0027.ph4\u0027,\u0027.ph5\u0027,\u0027.asp\u0027,\u0027.cgi\u0027,\u0027.phar\u0027), checked against the last 4-5 characters of the filename.\u003c/p\u003e"
                }
              ],
              "value": "Pluck CMS through 4.7.21 restricts dangerous file uploads in its admin file-management feature using a fixed blacklist in data/inc/files.php (\u0027.php\u0027,\u0027php3\u0027,\u0027php4\u0027,\u0027php5\u0027,\u0027php6\u0027,\u0027php7\u0027,\u0027phtml\u0027,\u0027.phtm\u0027,\u0027.pht\u0027,\u0027.ph3\u0027,\u0027.ph4\u0027,\u0027.ph5\u0027,\u0027.asp\u0027,\u0027.cgi\u0027,\u0027.phar\u0027), checked against the last 4-5 characters of the filename."
            }
          ],
          "metrics": [
            {
              "other": {
                "content": {
                  "value": "HIGH"
                },
                "type": "CVSS_3.1_severity"
              }
            },
            {
              "cvssV3_1": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.2,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "HIGH",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              }
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-434",
                  "description": "CWE-434 Unrestricted Upload of File with Dangerous Type",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-10T11:44:06.635Z",
            "orgId": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c",
            "shortName": "TuranSec"
          },
          "references": [
            {
              "tags": [
                "third-party-advisory"
              ],
              "url": "https://github.com/pluck-cms/pluck"
            }
          ],
          "source": {
            "discovery": "EXTERNAL"
          },
          "title": "Pluck CMS - Unrestricted File Upload via Missing .php8 Extension in Upload Blacklist"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c",
        "assignerShortName": "TuranSec",
        "cveId": "CVE-2026-54416",
        "datePublished": "2026-08-05T06:58:23.512Z",
        "dateReserved": "2026-06-13T16:39:46.122Z",
        "dateUpdated": "2026-08-10T11:44:06.635Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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

JSON

Loading timeline…




    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.