NamelessMC: Forum reactions bypass the "view own topics only" restriction

{
  "id": "5378ca75a3e94d790536ad269f9bb4b0120c36f3f5917d9df26b1a0650f74516",
  "url": "https://osv.dev/vulnerability/CVE-2026-35443",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "NamelessMC: Forum reactions bypass the \"view own topics only\" restriction",
    "summary": "NamelessMC is website software for Minecraft servers. In version 2.2.4, `modules/Forum/classes/ForumPostReactionContext.php` only verifies that the caller can view the forum, but it does not re-enforce topic-level `view_other_topics` authorization. As a result, in forums where users may enter the forum but may only view their own topics, reactions can still be read and modified on other users' topics. Version 2.2.5 fixes the issue.",
    "evidence": "osv:CVE-2026-35443",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-35443",
      "aliases": [
        "CVE-2026-35443",
        "GHSA-wcrf-5gcp-pf64"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/namelessmc/nameless",
              "type": "GIT",
              "events": [
                {
                  "introduced": "a1ee7ef46718836a3a9a4408cb5bc7c5a08b7efc"
                },
                {
                  "last_affected": "a1ee7ef46718836a3a9a4408cb5bc7c5a08b7efc"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "= 2.2.4"
                      },
                      {
                        "last_affected": "= 2.2.4"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  }
                ]
              }
            }
          ],
          "versions": [
            "= 2.2.4",
            "v2.2.4"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-35443.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:48.685195335Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35443.json",
        "https://github.com/NamelessMC/Nameless/security/advisories/GHSA-wcrf-5gcp-pf64",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-35443"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-862"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35443.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-35443",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 516996,
  "published_at": "2026-06-02T15:50:06.67+00:00"
}