Low severity · published Apr 16, 2025
CVE-2025-27538
MFA Enforcement Bypass Allows Unauthorized Removal of MFA for Other Users
2.7
CVSS
0.2%
EPSS
No
On KEV
Description
Mattermost versions 10.5.x <= 10.5.1, 9.11.x <= 9.11.9 fail to enforce MFA checks in PUT /api/v4/users/user-id/mfa when the requesting user differs from the target user ID, which allows users with edit_other_users permission to activate or deactivate MFA for other users, even if those users have not set up MFA.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 16% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
Mattermost · Mattermost
10.5.0 through 10.5.1; 9.11.0 through 9.11.9 · source: vendor
MS
Mattermost Server · Mattermost
9.11.0 before 9.11.10; 10.5.0 before 10.5.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-27538
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-27538
Vendor Advisory
https://mattermost.com/security-updates
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