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GHSA-h356-3mfw-x368

Mattermost Fails to Verify User's Permissions When Accessing Groups

Source: GitHub Advisory Database (reviewed) Moderate CVE-2025-2527

Packages

EcosystemPackageAffectedFixed in
Go github.com/mattermost/mattermost/server/v8 >= 10.5.0, < 10.5.3 10.5.3
Go github.com/mattermost/mattermost/server/v8 >= 9.11.0, < 9.11.12 9.11.12
Go github.com/mattermost/mattermost/server/v8 < 8.0.0-20250411064244-844447fbd57c 8.0.0-20250411064244-844447fbd57c

Details

As written in the advisory (Markdown source, shown as plain text).

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

External links from the advisory. They lead to third-party sites.