e107: Broken Access Control in e107 comment edit allows cross-user comment modification

{
  "id": "1994e648efa58ee99f9352af54f09d5aaa8bc2b6d38fc2e15cd447d6ca138e0e",
  "url": "https://osv.dev/vulnerability/CVE-2026-43934",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "e107: Broken Access Control in e107 comment edit allows cross-user comment modification",
    "summary": "e107 is a content management system (CMS). Prior to 2.3.4, a Broken Access Control vulnerability exists in the application, allowing an unauthorized authenticated user to edit comments posted by others. This stems from inadequate server-side access control validation, where the application depends only on a predictable identifier in the request to determine which comment to edit, without confirming the requesting user’s ownership of the comment. This vulnerability is fixed in 2.3.4.",
    "evidence": "osv:CVE-2026-43934",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-43934",
      "aliases": [
        "CVE-2026-43934",
        "GHSA-5w63-63rh-99q6"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/e107inc/e107",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "009145d2ddb96407d8ed996ec0152b90254c8822"
                },
                {
                  "fixed": "23961a8f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.3.4"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "23961a8f"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.3.3",
            "v2.3.2",
            "v2.3.1",
            "v2.3.0",
            "v2.3.0-rc1",
            "v2.2.1",
            "v2.2.0",
            "v2.1.9",
            "v2.1.8",
            "v2.1.7",
            "v2.1.6",
            "v2.1.5",
            "v2.1.4",
            "v2.1.3",
            "v2.1.2",
            "v2.1.1",
            "v2.0-beta1",
            "v2.0alpha"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43934.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:29.731184443Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43934.json",
        "https://github.com/e107inc/e107/security/advisories/GHSA-5w63-63rh-99q6",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-43934",
        "https://github.com/e107inc/e107/commit/23961a8f"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-284",
          "CWE-639"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43934.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-43934",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 496686,
  "published_at": "2026-05-26T14:54:21.21+00:00"
}