{"id":"CVE-2025-55074","state":"PUBLISHED","title":"Channel member objects leak read status","description":"Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11 fail to enforce access permissions on the Agents plugin which allows other users to determine when users had read channels via channel member objects","publishedAt":"2025-11-18T15:23:29.642Z","updatedAt":"2025-11-18T21:03:22.890Z","severity":{"score":3,"label":"Low","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:N","source":"Mattermost"},"assigner":"Mattermost","products":["Mattermost Mattermost"],"affected":[{"vendor":"Mattermost","product":"Mattermost","defaultStatus":"unaffected","versions":[{"version":"10.11.0","status":"affected","lessThanOrEqual":"10.11.3","versionType":"semver"},{"version":"10.5.0","status":"affected","lessThanOrEqual":"10.5.11","versionType":"semver"},{"version":"11.0.0","status":"unaffected"},{"version":"10.11.4","status":"unaffected"},{"version":"10.5.12","status":"unaffected"}]}],"references":["https://mattermost.com/security-updates"],"weaknesses":["CWE-1426"],"ingestedAt":"2026-10-29T20:09:31.862Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/55xxx/CVE-2025-55074.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-55074","state":"PUBLISHED","datePublished":"2025-11-18T15:23:29.642Z","dateUpdated":"2025-11-18T21:03:22.890Z","assignerShortName":"Mattermost","assignerOrgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","dateReserved":"2025-10-15T11:42:23.835Z"},"containers":{"cna":{"title":"Channel member objects leak read status","descriptions":[{"lang":"en","value":"Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11 fail to enforce access permissions on the Agents plugin which allows other users to determine when users had read channels via channel member objects"}],"affected":[{"vendor":"Mattermost","product":"Mattermost","defaultStatus":"unaffected","versions":[{"version":"10.11.0","status":"affected","lessThanOrEqual":"10.11.3","versionType":"semver"},{"version":"10.5.0","status":"affected","lessThanOrEqual":"10.5.11","versionType":"semver"},{"version":"11.0.0","status":"unaffected"},{"version":"10.11.4","status":"unaffected"},{"version":"10.5.12","status":"unaffected"}]}],"references":[{"url":"https://mattermost.com/security-updates"}],"metrics":[{"cvssV3_1":{"attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE","version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:N","baseSeverity":"LOW","baseScore":3},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1426","lang":"en","type":"CWE","description":"CWE-1426: Improper Validation of Generative AI Output"}]}],"providerMetadata":{"shortName":"Mattermost","orgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","dateUpdated":"2025-11-18T15:25:53.686Z"},"credits":[{"lang":"en","type":"finder","value":"Juho Forsén"}],"solutions":[{"value":"Update Mattermost to versions 11.0.0, 10.11.4, 10.5.12 or higher.","lang":"en"}],"source":{"advisory":"MMSA-2025-00451","defect":["https://mattermost.atlassian.net/browse/MM-62941"],"discovery":"{\"self\"=>\"https://mattermost.atlassian.net/rest/api/2/customFieldOption/10557\", \"value\"=>\"Internal\", \"id\"=>\"10557\"}"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-11-18T21:03:12.091209Z","id":"CVE-2025-55074","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":"2025-11-18T21:03:22.890Z"}}]}}}