Cotonti CSRF in admin.config.php allows unauthorized configuration changes

{
  "id": "15a89eb745648363a46760a24c15c77a9ffe9750f2eb7339a3d3485bd17ce14e",
  "url": "https://osv.dev/vulnerability/CVE-2026-55741",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Cotonti CSRF in admin.config.php allows unauthorized configuration changes",
    "summary": "Cotonti 1.0.0 (master branch, commit f43f1fc3) is vulnerable to Cross-Site Request Forgery in the administration configuration handler. In system/admin/admin.config.php, the configuration update action ('a=update') processes POST data via cot_config_update_options without calling cot_check_xg to validate the anti-CSRF token (the 'x' parameter), unlike other admin handlers (e.g. admin.structure.php, admin.cache.php).",
    "evidence": "osv:CVE-2026-55741",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-55741",
      "aliases": [
        "CVE-2026-55741"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/cotonti/cotonti",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0d554e939a315e7f7f18fba3ca1132b80c6a1adb"
                },
                {
                  "last_affected": "0d554e939a315e7f7f18fba3ca1132b80c6a1adb"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "1.0.0"
                      },
                      {
                        "last_affected": "1.0.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55741.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:34.781200048Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55741.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-55741",
        "https://github.com/Cotonti/Cotonti",
        "https://github.com/Cotonti/Cotonti/blob/f43f1fc38ba4e02027786dad9dac1435c7c52b30/system/admin/admin.config.php#L55"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-352"
        ],
        "cna_assigner": "TuranSec",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55741.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-55741",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 501945,
  "published_at": "2026-06-18T06:04:19.527+00:00"
}