{"id":"CVE-2025-21088","details":"Mattermost versions 10.2.x \u003c= 10.2.0, 9.11.x \u003c= 9.11.5, 10.0.x \u003c= 10.0.3, 10.1.x \u003c= 10.1.3 fail to properly validate the style of proto supplied to an action's style in post.props.attachments, which allows an attacker to crash the frontend via crafted malicious input.","aliases":["GHSA-8j3q-gc9x-7972","GO-2025-3393"],"modified":"2026-03-12T17:39:26.227106Z","published":"2025-01-15T16:15:32.413Z","related":["CGA-cgf5-4pp2-39xx","SUSE-SU-2025:0297-1","openSUSE-SU-2025:14704-1"],"references":[{"type":"ADVISORY","url":"https://mattermost.com/security-updates"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost-server","events":[{"introduced":"0bc2ddd42375a75ab14e63f038165150d4f07659"},{"fixed":"51ac054df0cf662ef3fa4657df4e058a33687135"},{"introduced":"2d83d21388f3111bffe4b1f63521b21d77ec2cef"},{"fixed":"ff3c76437efdef1fdf44f92434ac588e4d4e964c"},{"introduced":"50f91e2453188bbd0153db0e98714022db022a5c"},{"fixed":"90937a3832837b2d193c25aada123ee88942ebed"},{"introduced":"0"},{"last_affected":"9a578312304f06bb423d668fa8f1b975dc1fe79a"}],"database_specific":{"versions":[{"introduced":"9.11.0"},{"fixed":"9.11.6"},{"introduced":"10.0.0"},{"fixed":"10.0.4"},{"introduced":"10.1.0"},{"fixed":"10.1.4"},{"introduced":"0"},{"last_affected":"10.2.0-NA"}]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21088.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}