CVE-2025-24839: Mattermost Incorrect Authorization vulnerability

April 16, 2025 (updated April 23, 2025)

Mattermost versions 10.5.x <= 10.5.1, 10.4.x <= 10.4.3, 9.11.x <= 9.11.9 fail to prevent Wrangler posts from triggering AI responses. This vulnerability allows users without access to the AI bot to activate it by attaching the activate_ai override property to a post via the Wrangler plugin, provided both the AI and Wrangler plugins are enabled.

References

github.com/advisories/GHSA-j639-m367-75cf
github.com/mattermost/mattermost
mattermost.com/security-updates
nvd.nist.gov/vuln/detail/CVE-2025-24839
pkg.go.dev/vuln/GO-2025-3621

Code Behaviors & Features

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