CVE-2026-28741
HIGH WAF: Low
CVSS 8.1
Published: 2026-04-15
CWE-352
Mattermost versions 10.11.x <= 10.11.12, 11.5.x <= 11.5.0, 11.4.x <= 11.4.2, 11.3.x <= 11.3.2 fail to validate CSRF tokens on an authentication endpoint which allows an attacker to update a user's authentication method via a CSRF attack by tricking a user into visiting a malicious page. Mattermost Advisory ID: MMSA-2026-00625
WAF Coverage Analysis
Cross-Site Request Forgery (CSRF)
Low WAF Coverage
OWASP: A01:2021 Broken Access Control
Affected Software
| Vendor | Product | Version |
|---|---|---|
| mattermost | mattermost_server | 10.11.0 - 10.11.13 |
| mattermost | mattermost_server | 11.3.0 - 11.3.3 |
| mattermost | mattermost_server | 11.4.0 - 11.4.3 |
| mattermost | mattermost_server | 11.5.0 - 11.5.1 |
References
- mattermost.com (Vendor Advisory)