{"id":"EUVD-2025-175343","enisaUuid":"db691322-f38a-3b35-bb42-8e724947b009","description":"Mattermost versions 10.11.x \u003c\u003d 10.11.3, 10.5.x \u003c\u003d 10.5.11 fail to properly validate team membership permissions in the Add Channel Member API which allows users from one team to access user metadata and channel membership information from other teams via the API endpoint","datePublished":"Nov 13, 2025, 5:32:03 PM","dateUpdated":"Nov 13, 2025, 6:01:46 PM","baseScore":3.1,"baseScoreVersion":"3.1","baseScoreVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","references":"https://mattermost.com/security-updates\n","aliases":"CVE-2025-11777\nGHSA-mqcj-8c2g-h97q\n","assigner":"Mattermost","epss":0.2,"enisaIdProduct":[{"id":"5d940362-84bf-3265-9801-f2c481aa169b","product":{"name":"Mattermost","vendor":{"name":"Mattermost"}},"product_version":"10.11.0 ≤10.11.3"},{"id":"cd3fe3fa-2ab1-31c2-a398-647f34d9b8b8","product":{"name":"Mattermost","vendor":{"name":"Mattermost"}},"product_version":"10.5.0 ≤10.5.11"}],"enisaIdVendor":[{"id":"1a9bda3a-20da-3732-82fa-6b38aedcf7bc","vendor":{"name":"Mattermost"}}],"enisaIdVulnerability":[{"id":"6aa21176-e017-316c-98ae-4e75d630973c","vulnerability":{"id":"GHSA-mqcj-8c2g-h97q","description":"Mattermost Incorrect Authorization vulnerability","datePublished":"Nov 13, 2025, 6:31:05 PM","dateUpdated":"Nov 14, 2025, 3:54:51 PM","baseScore":0.0,"references":"https://nvd.nist.gov/vuln/detail/CVE-2025-11777\nhttps://github.com/mattermost/mattermost/commit/98acefe911dd9de7edf47a7d825dd99f53141a52\nhttps://github.com/mattermost/mattermost/commit/ba86dfc5876b354b9d3c20ff45c08ca6f8426149\nhttps://github.com/mattermost/mattermost/commit/d72d437f1567ba0b639b6e4fd73bab06c51baab5\nhttps://github.com/mattermost/mattermost\nhttps://mattermost.com/security-updates\n","enisa_id":"EUVD-2025-175343\n","aliases":"CVE-2025-11777\nGHSA-mqcj-8c2g-h97q\n","epss":0.0,"dataProcessed":"Oct 25, 2026, 1:51:54 AM","vulnerabilityProduct":[],"vulnerabilityVendor":[]}},{"id":"eaac655d-80f0-3afa-8839-c1596acc981f","vulnerability":{"id":"CVE-2025-11777","description":"Mattermost versions 10.11.x \u003c\u003d 10.11.3, 10.5.x \u003c\u003d 10.5.11 fail to properly validate team membership permissions in the Add Channel Member API which allows users from one team to access user metadata and channel membership information from other teams via the API endpoint","datePublished":"Nov 13, 2025, 5:32:03 PM","dateUpdated":"Nov 13, 2025, 6:01:46 PM","status":"PUBLISHED","baseScore":3.1,"baseScoreVersion":"3.1","baseScoreVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","references":"https://mattermost.com/security-updates\n","enisa_id":"EUVD-2025-175343\n","assigner":"Mattermost","epss":0.2,"dataProcessed":"Oct 27, 2026, 7:16:42 AM","vulnerabilityProduct":[{"id":"1fb757dc-4abe-312b-bc0e-2c1b4b33b5ad","product":{"name":"Mattermost","vendor":{"name":"Mattermost"}},"product_version":"10.5.0 ≤10.5.11"},{"id":"85c3636f-2001-3ae0-9c3a-67c8d5198486","product":{"name":"Mattermost","vendor":{"name":"Mattermost"}},"product_version":"10.11.0 ≤10.11.3"}],"vulnerabilityVendor":[{"id":"c84d7865-22a5-331e-a67a-bad5017fefe3","vendor":{"name":"Mattermost"}}]}}],"enisaIdAdvisory":[]}