{"id":"CVE-2025-14350","state":"PUBLISHED","title":"Information disclosure via channel mentions in posts","description":"Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to properly validate team membership when processing channel mentions which allows authenticated users to determine the existence of teams and their URL names via posting channel shortlinks and observing the channel_mentions property in the API response. Mattermost Advisory ID: MMSA-2025-00563","publishedAt":"2026-02-16T12:05:33.312Z","updatedAt":"2026-02-17T17:06:07.112Z","severity":{"score":4.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","source":"Mattermost"},"assigner":"Mattermost","products":["Mattermost Mattermost"],"affected":[{"vendor":"Mattermost","product":"Mattermost","defaultStatus":"unaffected","versions":[{"version":"11.1.0","status":"affected","lessThanOrEqual":"11.1.2","versionType":"semver"},{"version":"10.11.0","status":"affected","lessThanOrEqual":"10.11.9","versionType":"semver"},{"version":"11.2.0","status":"affected","lessThanOrEqual":"11.2.1","versionType":"semver"},{"version":"11.3.0","status":"unaffected"},{"version":"11.1.3","status":"unaffected"},{"version":"10.11.10","status":"unaffected"},{"version":"11.2.2","status":"unaffected"}]}],"references":["https://mattermost.com/security-updates"],"weaknesses":["CWE-862"],"ingestedAt":"2026-10-29T20:08:31.050Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/14xxx/CVE-2025-14350.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-14350","state":"PUBLISHED","datePublished":"2026-02-16T12:05:33.312Z","dateUpdated":"2026-02-17T17:06:07.112Z","assignerShortName":"Mattermost","assignerOrgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","dateReserved":"2025-12-09T15:43:31.735Z"},"containers":{"cna":{"title":"Information disclosure via channel mentions in posts","descriptions":[{"lang":"en","value":"Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to properly validate team membership when processing channel mentions which allows authenticated users to determine the existence of teams and their URL names via posting channel shortlinks and observing the channel_mentions property in the API response. Mattermost Advisory ID: MMSA-2025-00563"}],"affected":[{"vendor":"Mattermost","product":"Mattermost","defaultStatus":"unaffected","versions":[{"version":"11.1.0","status":"affected","lessThanOrEqual":"11.1.2","versionType":"semver"},{"version":"10.11.0","status":"affected","lessThanOrEqual":"10.11.9","versionType":"semver"},{"version":"11.2.0","status":"affected","lessThanOrEqual":"11.2.1","versionType":"semver"},{"version":"11.3.0","status":"unaffected"},{"version":"11.1.3","status":"unaffected"},{"version":"10.11.10","status":"unaffected"},{"version":"11.2.2","status":"unaffected"}]}],"references":[{"url":"https://mattermost.com/security-updates","name":"MMSA-2025-00563","tags":["vendor-advisory"]}],"metrics":[{"cvssV3_1":{"attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE","version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","baseSeverity":"MEDIUM","baseScore":4.3},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-862","lang":"en","type":"CWE","description":"CWE-862: Missing Authorization"}]}],"providerMetadata":{"shortName":"Mattermost","orgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","dateUpdated":"2026-02-16T12:05:33.312Z"},"credits":[{"lang":"en","type":"finder","value":"Harrison Healey"}],"solutions":[{"value":"Update Mattermost to versions 11.3.0, 11.1.3, 10.11.10, 11.2.2 or higher.","lang":"en"}],"source":{"advisory":"MMSA-2025-00563","defect":["https://mattermost.atlassian.net/browse/MM-66790"],"discovery":"{\"self\"=>\"https://mattermost.atlassian.net/rest/api/2/customFieldOption/10557\", \"value\"=>\"Internal\", \"id\"=>\"10557\"}"},"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-02-17T16:42:13.718962Z","id":"CVE-2025-14350","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-02-17T17:06:07.112Z"}}]}}}