Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file rescanMultiple()

{
  "id": "a824569a668312090ff697294cb4b57fb86c479c9bf4d84869faeb4d74063fd2",
  "url": "https://osv.dev/vulnerability/CVE-2026-8434",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file rescanMultiple()",
    "summary": "Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/backend/file rescanMultiple(). The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 2.3 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Yonatan Drori (Tenzai) for reporting.",
    "evidence": "osv:CVE-2026-8434",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2026-8434",
      "aliases": [
        "CVE-2026-8434",
        "GHSA-6qjh-p324-694f"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/concretecms/concretecms",
              "type": "GIT",
              "events": [
                {
                  "introduced": "b3774abddd475b4ba98b637402506f7a5ebd90ea"
                },
                {
                  "fixed": "92bae566b9ec573cfb3017fcbb6db454a6586997"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "9.0"
                      },
                      {
                        "last_affected": "9.5.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "cpe": "cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "9.0.0"
                      },
                      {
                        "fixed": "9.5.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-8434.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.091927412Z",
      "provider": "osv",
      "references": [
        "https://documentation.concretecms.org/9-x/developers/introduction/version-history/951-release-notes",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8434.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-8434",
        "https://github.com/concretecms/concretecms"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-1275",
          "CWE-352"
        ],
        "cna_assigner": "ConcreteCMS",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8434.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-8434",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 497214,
  "published_at": "2026-05-21T21:23:52.318+00:00"
}