medium5.7
CVE-2025-13821
Mattermost fails to sanitize sensitive data in WebSocket messages
Impact
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
Affected 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 | >= 11.1.0, < 11.1.3 | none recorded |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mattermost | Mattermost Server | from 10.11.0 before 10.11.10 from 11.1.0 before 11.1.3 from 11.2.0 before 11.2.2 |