GHSA-pp9j-pf5c-659x
Mattermost fails to sanitize sensitive data in WebSocket messages
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Go | github.com/mattermost/mattermost/server/v8 | < 8.0.0-20251210191531-cd17b61de41b | 8.0.0-20251210191531-cd17b61de41b |
| Go | github.com/mattermost/mattermost-server | < 11.1.3 | no fix listed |
| Go | github.com/mattermost/mattermost-server | < 10.11.10 | no fix listed |
| Go | github.com/mattermost/mattermost-server | < 11.2.2 | no fix listed |
| Go | github.com/mattermost/mattermost-server | < 5.3.2-0.20251210191531-cd17b61de41b | 5.3.2-0.20251210191531-cd17b61de41b |
Details
As written in the advisory (Markdown source, shown as plain text).
Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to sanitize sensitive data in WebSocket messages which allows authenticated users to exfiltrate password hashes and MFA secrets via profile nickname updates or email verification events. Mattermost Advisory ID: MMSA-2025-00560
References
External links from the advisory. They lead to third-party sites.