CVE-2025-2527: Mattermost Fails to Verify User's Permissions When Accessing Groups

May 15, 2025 (updated May 17, 2025)

Mattermost versions 10.5.x <= 10.5.2, 9.11.x <= 9.11.11 failed to properly verify a user’s permissions when accessing groups, which allows an attacker to view group information via an API request.

References

github.com/advisories/GHSA-h356-3mfw-x368
github.com/mattermost/mattermost
mattermost.com/security-updates
nvd.nist.gov/vuln/detail/CVE-2025-2527

Code Behaviors & Features

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