{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2025-10545","assignerOrgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","state":"PUBLISHED","assignerShortName":"Mattermost","dateReserved":"2025-09-16T08:41:00.850Z","datePublished":"2025-10-16T08:24:25.928Z","dateUpdated":"2025-10-16T14:14:09.887Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Mattermost","vendor":"Mattermost","versions":[{"lessThanOrEqual":"10.5.10","status":"affected","version":"10.5.0","versionType":"semver"},{"lessThanOrEqual":"10.11.2","status":"affected","version":"10.11.0","versionType":"semver"},{"version":"10.12.0","status":"unaffected"},{"version":"10.5.11","status":"unaffected"},{"version":"10.11.3","status":"unaffected"}]}],"credits":[{"lang":"en","type":"finder","value":"lordwillmore"}],"descriptions":[{"lang":"en","value":"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"}],"metrics":[{"cvssV3_1":{"attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE","version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","baseSeverity":"LOW","baseScore":3.1},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","description":"CWE-863: Incorrect Authorization","cweId":"CWE-863"}]}],"references":[{"url":"https://mattermost.com/security-updates"}],"solutions":[{"value":"Update Mattermost to versions 10.12.0, 10.5.11, 10.11.3 or higher.","lang":"en"}],"source":{"advisory":"MMSA-2025-00497","defect":["https://mattermost.atlassian.net/browse/MM-64444"],"discovery":"EXTERNAL"},"title":"Guest user can add unauthorized team users to private channels","providerMetadata":{"orgId":"9302f53e-dde5-4bf3-b2f2-a83f91ac0eee","shortName":"Mattermost","dateUpdated":"2025-10-16T08:24:25.928Z"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-10-16T14:13:30.975814Z","id":"CVE-2025-10545","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2025-10-16T14:14:09.887Z"}}]}}