Security advisory

{
  "id": "2866b5712ecb2ea3e989cf6b2bcd006e5dac58cb361aff4584e153924cc206e8",
  "url": "https://osv.dev/vulnerability/CVE-2024-1952",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2024-1952",
    "summary": "Mattermost version 8.1.x before 8.1.9 fails to sanitize data associated with permalinks when a plugin updates an ephemeral post, allowing an authenticated attacker who can control the ephemeral post update to access individual posts' contents in channels they are not a member of.",
    "evidence": "osv:CVE-2024-1952",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2024-1952",
      "aliases": [
        "BIT-mattermost-2024-1952",
        "CVE-2024-1952",
        "GHSA-r4fm-g65h-cr54",
        "GO-2024-2635"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/mattermost/mattermost",
              "type": "GIT",
              "events": [
                {
                  "introduced": "096c9ea12a2144f832e330e9a0f4d3862ca20b9f"
                },
                {
                  "fixed": "4c83724516242843802cc75840b08ead6afbd37b"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "8.1.0"
                      },
                      {
                        "fixed": "8.1.9"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v8.1.9-rc2",
            "v8.1.9-rc1",
            "v8.1.8",
            "v8.1.8-rc2",
            "v8.1.8-rc1",
            "v8.1.7-rc3",
            "v8.1.7",
            "v8.1.7-rc2",
            "v8.1.7-rc1",
            "v8.1.6-rc1",
            "v8.1.6",
            "v8.1.5-rc2",
            "v8.1.5",
            "v8.1.5-rc1",
            "v8.1.4-rc2",
            "v8.1.4",
            "v8.1.4-rc1",
            "v8.1.3-rc2",
            "v8.1.3",
            "v8.1.3-rc1",
            "v8.1.2-rc2",
            "v8.1.2",
            "v8.1.2-rc1",
            "v8.1.1-rc2",
            "v8.1.1",
            "@mattermost/types@8.1.1",
            "@mattermost/client@8.1.1",
            "v8.1.1-rc1",
            "v8.1.0-rc2",
            "v8.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-1952.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:25.479955544Z",
      "provider": "osv",
      "references": [
        "https://mattermost.com/security-updates",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/1xxx/CVE-2024-1952.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-1952"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-200"
        ],
        "cna_assigner": "Mattermost",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "8.1.0"
                  },
                  {
                    "last_affected": "8.1.8"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/1xxx/CVE-2024-1952.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-1952",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 492148,
  "published_at": "2024-02-29T10:42:15.362+00:00"
}