Contao is vulnerable to remote code execution in template closures

{
  "id": "9944ea03e50e6e8da70474044fd66d10c9a4f594b1e952697a77885f5c4bb6a8",
  "url": "https://osv.dev/vulnerability/CVE-2025-65960",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Contao is vulnerable to remote code execution in template closures",
    "summary": "Contao is an Open Source CMS. From version 4.0.0 to before 4.13.57, before 5.3.42, and before 5.6.5, back end users with precise control over the contents of template closures can execute arbitrary PHP functions that do not have required parameters. This issue has been patched in versions 4.13.57, 5.3.42, and 5.6.5. A workaround for this issue involves manually patching the Contao\\Template::once() method.",
    "evidence": "osv:CVE-2025-65960",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2025-65960",
      "aliases": [
        "CVE-2025-65960",
        "GHSA-98vj-mm79-v77r"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/contao/contao",
              "type": "GIT",
              "events": [
                {
                  "introduced": "84b2fe637d5ead531f117f26b48d1b9de8df4074"
                },
                {
                  "fixed": "4dc65d395b4c62e0b1f6dbd86f4b5948610f64a5"
                },
                {
                  "introduced": "8cb541c59cb07ecb62fc5c5685c6448f38b97ad8"
                },
                {
                  "fixed": "85d5af6d350d9a72822fc3793c7ab692bb8191e6"
                },
                {
                  "introduced": "3173ec39227e5454439be24f7169bad5e0eb69f8"
                },
                {
                  "fixed": "760f3a8e29ff7b26d3f8c06617eb51dd5559ceac"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:contao:contao:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.0.0"
                      },
                      {
                        "fixed": "4.13.57"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:contao:contao:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "5.0.0"
                      },
                      {
                        "fixed": "5.3.42"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:contao:contao:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "5.4.0"
                      },
                      {
                        "fixed": "5.6.5"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-65960.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:32.763784612Z",
      "provider": "osv",
      "references": [
        "https://contao.org/en/security-advisories/remote-code-execution-in-template-closures",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/65xxx/CVE-2025-65960.json",
        "https://github.com/contao/contao/security/advisories/GHSA-98vj-mm79-v77r",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-65960"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-351"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/65xxx/CVE-2025-65960.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-65960",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 500073,
  "published_at": "2025-11-25T18:54:48.897+00:00"
}