{"schema_version":"1.9.0","id":"CVE-2025-27936","published":"2025-04-16T09:14:55.095Z","modified":"2026-08-12T03:51:18.039439520Z","aliases":["GHSA-2j87-p623-8cc2","GO-2025-3618"],"related":["CGA-wv5w-mg9x-7cr4","openSUSE-SU-2025:15017-1"],"summary":"Webhook Secret Exposure via Timing attack in MSteams plugin","details":"Mattermost Plugin MSTeams versions <2.1.0 and Mattermost Server versions 10.5.x <=10.5.1 with the MS Teams plugin enabled fail to perform constant time comparison on a MSTeams plugin webhook secret which allows an attacker to retrieve the webhook secret of the MSTeams plugin via a timing attack during webhook secret comparison.","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost","events":[{"introduced":"0"},{"fixed":"09ccf277a61f68bdbf2453c987af463ed29d6376"}],"database_specific":{"cpe":"cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"10.5.2"}],"source":"CPE_RANGE"}}],"versions":["v10.5.1","v10.5.1-rc2","v10.5.1-rc1","v10.5.0-rc6","v10.5.0","@mattermost/types@10.5.0","@mattermost/client@10.5.0","v10.5.0-rc5","v10.5.0-rc4","v10.5.0-rc3","v10.5.0-rc2","v10.5.0-rc1","server/public/v0.1.9","server/public/v0.1.8","server/public/v0.1.7","server/public/v0.1.6","server/public/v0.1.5","server/public/v0.1.4","server/public/v0.1.3","server/public/v0.1.2","server/public/v0.1.1","server/public/v0.1.0","server/public/v0.0.18","server/public/v0.0.17","server/public/v0.0.16","server/public/v0.0.15","server/public/v0.0.14","server/public/v0.0.13","server/public/v0.0.12","server/public/v0.0.11","server/public/v0.0.10","server/public/v0.0.9","server/public/v0.0.8","server/public/v0.0.7","server/public/v0.0.6","server/public/v0.0.5","cloud-2022-11-24-1","cloud-2022-11-11-1","cloud-2022-10-06-1","cloud-2022-09-08-1","cloud-2022-08-10-1","cloud-2022-07-20-1","v5.2.0-rc2","v5.2.0-rc1","v5.1.0-rc1","v5.0.0-rc1","v4.10.0-rc1","v4.9.0-rc1","v4.8.0-rc1","v4.7.0-rc1","v4.6.0-rc2","v4.6.0-rc1","v4.5.0-rc1","v4.4.0-rc1","v4.3.0-rc1","v4.2.0-rc1","v0.5.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-27936.json"}},{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost-plugin-msteams","events":[{"introduced":"0"},{"fixed":"4a29bb104ccb81ab2212d08f5c0b7a57152d3db9"}],"database_specific":{"cpe":"cpe:2.3:a:mattermost:ms_teams:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"2.1.0"}],"source":"CPE_RANGE"}}],"versions":["v2.0.3","v2.0.2","v2.0.1","v2.0.0","v1.15.0","v1.14.0","v1.13.0","v1.12.0","v1.11.0","v1.10.1","v1.10.0","v1.9.1","v1.9.0","v1.8.2","v1.8.1","v1.8.0","v1.7.0","v1.6.1","v1.6.0","v1.5.3","v1.5.2","v1.5.1","v1.5.0","v1.4.0-rc1","v1.4.0","v1.3.1","v1.3.0","v1.2.0","v1.1.0","v1.0.8","v1.0.7","v1.0.6","v1.0.5","v1.0.4","v1.0.3","v1.0.2","v1.0.1","v1.0.0","v0.3.13","v0.3.12","v0.3.10","v0.3.9","v0.3.8","v0.3.7","v0.3.6","v0.3.5","v0.3.4","v0.3.3","v0.3.2","v0.3.1","v0.3.0","v0.2.0","v0.0.1","0.0.1-alpha"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-27936.json"}}],"references":[{"type":"WEB","url":"https://mattermost.com/security-updates"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/27xxx/CVE-2025-27936.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-27936"}],"database_specific":{"cna_assigner":"Mattermost","cwe_ids":["CWE-208"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/27xxx/CVE-2025-27936.json","unresolved_ranges":[{"extracted_events":[{"introduced":"10.5.0"},{"last_affected":"10.5.1"}],"source":"AFFECTED_FIELD"}]},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"}]}