CVE-2025-31947 — Overly Restrictive Account Lockout Mechanism in Mattermost Mattermost-server

CWE-645 — Overly Restrictive Account Lockout Mechanism5 documents4 sources
Severity
5.3MEDIUMNVD
CNA5.8
EPSS
0.4%
top 41.77%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
Github.com Mattermost Mattermost-serverGithub.com Mattermost Mattermost Server V8Mattermost Server+1 more
Timeline
PublishedMay 15
Latest updateMay 23

Description

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LExploitability: 3.9 | Impact: 1.4

Affected Packages4 packages

▶NVDmattermost/mattermost_server9.11.0 — 9.11.12+3
▶Gogithub.com/mattermost_mattermost-server9.11.0+incompatible — 9.11.12+incompatible+3
▶CVEListV5mattermost/mattermost10.6.0 — 10.6.1+3

🔴Vulnerability Details

4
OSV
Mattermost Fails to Lockout LDAP Users After Repeated Login Failures in github.com/mattermost/mattermost-server↗2025-05-23
▶
GHSA
Mattermost Fails to Lockout LDAP Users After Repeated Login Failures↗2025-05-15
▶
OSV
Mattermost Fails to Lockout LDAP Users After Repeated Login Failures↗2025-05-15
▶
CVEList
Repeated LDAP login failures can lock an LDAP account↗2025-05-15
▶
CVE-2025-31947 — MEDIUM severity | cvebase