{"id":"CVE-2025-10545","revision":"cbd197d4e9894278b8911bb9d751c293","records":[{"revision":"cbd197d4e9894278b8911bb9d751c293","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-10545","aliases":[],"title":"Guest user can add unauthorized team users to private channels","description":"Mattermost versions 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to properly validate guest user permissions when adding channel members which allows guest users to add any team members to their private channels via the `/api/v4/channels/{channel_id}/members` endpoint","state":0,"publishedAt":"2025-10-16T08:24:25.928+00:00","modifiedAt":"2025-10-16T14:14:09.887+00:00","affected":[{"ecosystem":"Vendor product","name":"Mattermost","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"defaultStatus\": \"unaffected\",\n                    \"product\": \"Mattermost\",\n                    \"vendor\": \"Mattermost\",\n                    \"versions\": [\n                        {\n                            \"lessThanOrEqual\": \"10.5.10\",\n                            \"status\": \"affected\",\n                            \"version\": \"10.5.0\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"lessThanOrEqual\": \"10.11.2\",\n                            \"status\": \"affected\",\n                            \"version\": \"10.11.0\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"10.12.0\",\n                            \"status\": \"unaffected\"\n                        },\n                        {\n                            \"version\": \"10.5.11\",\n                            \"status\": \"unaffected\"\n                        },\n                        {\n                            \"version\": \"10.11.3\",\n                            \"status\": \"unaffected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","score":3.1,"severity":"LOW"}],"references":["https://mattermost.com/security-updates"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-10545","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-10545","identifiers":["CVE-2025-10545"]},"retained":false,"historicalAffected":[]}],"coverage":[]}