LOW 3.0 Go
Mattermost GitHub Plugin Bot Identity Validation Bypass Allows Arbitrary GitHub Reaction Injection
GHSA-jf5h-xfw4-p8gp · CVE-2025-13352 · GO-2025-4247
Published · Modified
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Description
Mattermost versions 10.11.x <= 10.11.6 and Mattermost GitHub plugin versions <=2.4.0 fail to validate plugin bot identity in reaction forwarding which allows attackers to hijack the GitHub reaction feature to make users add reactions to arbitrary GitHub objects via crafted notification posts.
References
- ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2025-13352
- WEB https://github.com/mattermost/mattermost-plugin-github/commit/0deffcfc6bee7eaf01f7c99100e3d12e8d9df68c
- WEB https://github.com/mattermost/mattermost/commit/3b05384dd0146c1be3caa620a42e00e46027055d
- PACKAGE https://github.com/mattermost/mattermost
- WEB https://mattermost.com/security-updates
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