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5.8

Mattermost can lock external LDAP accounts after failed logins

CVE-2025-31947 · published 1 year ago
Summary

Versions of Mattermost up to 10.6.1, 10.5.2, 10.4.4, and 9.11.11 do not stop repeated sign‑in attempts from locking user accounts stored in an external directory service (LDAP). An attacker could deliberately cause a legitimate user's account to become unavailable. Upgrade to a version that fixes the issue or apply the vendor’s recommended update as soon as possible.

What to do
  • Update github.com mattermost to version 10.6.2.
  • Update github.com mattermost to version 10.5.3.
  • Update github.com mattermost to version 10.4.5.
  • Update github.com mattermost to version 9.11.12.
  • Update github.com mattermost to version 8.0.0-20250415054241-76ab3867b785.
Affected software
Ecosystem VendorProductAffected versions
go github.com mattermost >= 10.6.0, <= 10.6.1
>= 10.5.0, <= 10.5.2
>= 10.4.0, <= 10.4.4
>= 9.11.0, <= 9.11.11
< 8.0.0-20250415054241-76ab3867b785
Fix: upgrade to 10.6.2
– mattermost mattermost_server >= 9.11.0, < 9.11.12
>= 10.4.0, < 10.4.5
>= 10.5.0, < 10.5.3
>= 10.6.0, < 10.6.2
cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
Original advisory text
Repeated LDAP login failures can lock an LDAP account
Mattermost versions 10.6.x <= 10.6.1, 10.5.x <= 10.5.2, 10.4.x <= 10.4.4, 9.11.x <= 9.11.11 fail to lockout LDAP users following repeated login failures, which allows attackers to lock external LDAP accounts through repeated login failures through Mattermost.
References
Fix within
Internet-facing 14 days
Internal 60 days
  • Not known to be exploited
  • Can be exploited automatically
  • Gives an attacker partial control
Severity
5.8 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-645Overly Restrictive Account Lockout Mechanism
Timeline
Published15 May 2025
Updated4 Nov 2026
First seen6 Mar 2026
Sources
GHSA-qgwx-rffp-6cx9 · GHSA
CVE-2025-31947 · NVD
CVE-2025-31947 · OSV
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