{"id":"CVE-2025-12559","state":"PUBLISHED","title":"Information Disclosure in Common Teams API","description":"Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to sanitize team email addresses to be visible only to Team Admins, which allows any authenticated user to view team email addresses via the GET /api/v4/channels/{channel_id}/common_teams endpoint","publishedAt":"2025-11-27T16:36:30.545Z","updatedAt":"2025-11-28T15:20:44.142Z","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":"11.0.0","status":"affected","lessThanOrEqual":"11.0.2","versionType":"semver"},{"version":"10.12.0","status":"affected","lessThanOrEqual":"10.12.1","versionType":"semver"},{"version":"10.11.0","status":"affected","lessThanOrEqual":"10.11.4","versionType":"semver"},{"version":"10.5.0","status":"affected","lessThanOrEqual":"10.5.12","versionType":"semver"},{"version":"11.1.0","status":"unaffected"},{"version":"11.0.3","status":"unaffected"},{"version":"10.12.2","status":"unaffected"},{"version":"10.11.5","status":"unaffected"},{"version":"10.5.13","status":"unaffected"}]}],"references":["https://mattermost.com/security-updates"],"weaknesses":["CWE-200"],"ingestedAt":"2026-10-29T20:08:31.050Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/12xxx/CVE-2025-12559.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-12559","state":"PUBLISHED","datePublished":"2025-11-27T16:36:30.545Z","dateUpdated":"2025-11-28T15:20:44.142Z","assignerShortName":"Mattermost","assignerOrgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","dateReserved":"2025-10-31T17:28:45.000Z"},"containers":{"cna":{"title":"Information Disclosure in Common Teams API","descriptions":[{"lang":"en","value":"Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to sanitize team email addresses to be visible only to Team Admins, which allows any authenticated user to view team email addresses via the GET /api/v4/channels/{channel_id}/common_teams endpoint"}],"affected":[{"vendor":"Mattermost","product":"Mattermost","defaultStatus":"unaffected","versions":[{"version":"11.0.0","status":"affected","lessThanOrEqual":"11.0.2","versionType":"semver"},{"version":"10.12.0","status":"affected","lessThanOrEqual":"10.12.1","versionType":"semver"},{"version":"10.11.0","status":"affected","lessThanOrEqual":"10.11.4","versionType":"semver"},{"version":"10.5.0","status":"affected","lessThanOrEqual":"10.5.12","versionType":"semver"},{"version":"11.1.0","status":"unaffected"},{"version":"11.0.3","status":"unaffected"},{"version":"10.12.2","status":"unaffected"},{"version":"10.11.5","status":"unaffected"},{"version":"10.5.13","status":"unaffected"}]}],"references":[{"url":"https://mattermost.com/security-updates"}],"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-200","lang":"en","type":"CWE","description":"CWE-200 Exposure of Sensitive Information to an Unauthorized Actor"}]}],"providerMetadata":{"shortName":"Mattermost","orgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","dateUpdated":"2025-11-27T16:36:30.545Z"},"credits":[{"lang":"en","type":"finder","value":"hainguyen0207"}],"solutions":[{"value":"Update Mattermost to versions 11.1.0, 11.0.3, 10.12.2, 10.11.5, 10.5.13 or higher.","lang":"en"}],"source":{"advisory":"MMSA-2025-00526","defect":["https://mattermost.atlassian.net/browse/MM-65683"],"discovery":"EXTERNAL"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-11-28T15:20:22.362371Z","id":"CVE-2025-12559","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":"2025-11-28T15:20:44.142Z"}}]}}}