VDB
CVE-2025-13821
CVE-2025-13821
PUBLISHED
CVSS 5.699999809265137 MEDIUM
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
EPSS 0.04% · 13.9th percentile
Risk Scores
CVSS 3.1
5.699999809265137
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
EPSS Score
0.04%
13.9th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| github.com | mattermost/mattermost/server/v8 | 0, 0, 0 |
| github.com | mattermost/mattermost-server | 0, 11.2.0, 11.1.0 |
| Mattermost | Mattermost | 11.1.0, 11.1.0, 10.11.0 |
| mattermost | mattermost_server | 11.1.0, 10.11.0, 11.2.0 |
Timeline
- Jan 16, 2026 CVE Published
- Feb 16, 2026 EPSS Score
- Feb 18, 2026 EPSS Score
- Feb 20, 2026 EPSS Score
- Feb 21, 2026 EPSS Score
- Feb 23, 2026 EPSS Score
- Feb 25, 2026 EPSS Score
- Feb 27, 2026 EPSS Score
- Mar 1, 2026 EPSS Score
- Mar 3, 2026 EPSS Score
- Mar 4, 2026 EPSS Score
- Mar 6, 2026 EPSS Score