LDAP User Authentication Vulnerability in Mattermost by Mattermost
CVE-2025-31947

5.8MEDIUM

Key Information:

Vendor

Mattermost
Status
Mattermost
Vendor
CVE Published:
15 May 2025

What is CVE-2025-31947?

Certain versions of Mattermost are vulnerable due to their failure to lock out external LDAP user accounts after multiple failed login attempts. This loophole allows malicious actors to exploit this feature, potentially gaining unauthorized access by triggering repeated login failures against LDAP accounts. Such vulnerabilities can lead to unauthorized access breaches, posing a significant risk to sensitive information within the Mattermost platform.

Affected Version(s)

Mattermost 10.6.0 <= 10.6.1

Mattermost 10.5.0 <= 10.5.2

Mattermost 10.4.0 <= 10.4.4

References

https://mattermost.com/security-updates

CVSS V3.1

Score:
5.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

John Landells
.
CVE-2025-31947 : LDAP User Authentication Vulnerability in Mattermost by Mattermost