low3.0
CVE-2025-13352
Mattermost GitHub Plugin Bot Identity Validation Bypass Allows Arbitrary GitHub Reaction Injection
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost/server/v8 | >= 10.11.0-rc1, < 10.11.7-0.20251106103514-3b05384dd014 | 10.11.7-0.20251106103514-3b05384dd014 |
| go | github.com/mattermost/mattermost | < 10.11.7-0.20251106103514-3b05384dd014 | 10.11.7-0.20251106103514-3b05384dd014 |
| go | github.com/mattermost/mattermost-plugin-github | < 1.0.1-0.20250829075715-0deffcfc6bee | 1.0.1-0.20250829075715-0deffcfc6bee |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mattermost | Mattermost Server | from 10.11.0 before 10.11.7 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://mattermost.com/security-updates
- https://github.com/advisories/GHSA-jf5h-xfw4-p8gp
- https://nvd.nist.gov/vuln/detail/CVE-2025-13352
- https://github.com/mattermost/mattermost-plugin-github/commit/0deffcfc6bee7eaf01f7c99100e3d12e8d9df68c
- https://github.com/mattermost/mattermost/commit/3b05384dd0146c1be3caa620a42e00e46027055d