CVE-2026-28741
CSRF Protection Bypass Allows Updating a User's Authentication Method
CVSS Score
6.8
EPSS Score
0.0%
EPSS Percentile
3th
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
| CWE | CWE-352 |
| Vendor | mattermost |
| Product | mattermost |
| Published | Apr 15, 2026 |
| Last Updated | Apr 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
Mattermost / Mattermost
10.11.0 ≤ 10.11.12 11.5.0 ≤ 11.5.0 11.4.0 ≤ 11.4.2 11.3.0 ≤ 11.3.2
Credits
Eva Sarafianou