GHSA-3vcm-c42p-3hhf
Mattermost Missing Authorization vulnerability
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Go | github.com/mattermost/mattermost/server/v8 | < 8.0.0-20250729073403-517ae758cd02 | 8.0.0-20250729073403-517ae758cd02 |
| Go | github.com/mattermost/mattermost-server | >= 10.10.0, < 10.10.2 | 10.10.2 |
Details
As written in the advisory (Markdown source, shown as plain text).
Mattermost versions 10.10.x <= 10.10.1 fail to properly sanitize user data during shared channel membership synchronization, which allows malicious or compromised remote clusters to access sensitive user information via unsanitized user objects. This vulnerability affects Mattermost Server instances with shared channels enabled.
References
External links from the advisory. They lead to third-party sites.