medium5.4
CVE-2025-55073
Mattermost allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL
Impact
Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11, 10.12.x <= 10.12.0 fail to validate the relationship between the post being updated and the MSTeams plugin OAuth flow which allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost-server | >= 10.11.0, < 10.11.4 | 10.11.4 |
| go | github.com/mattermost/mattermost/server/v8 | < 8.0.0-20250929212932-a41db04d2746 | 8.0.0-20250929212932-a41db04d2746 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mattermost | Mattermost Server | from 10.5.0 before 10.5.12 from 10.11.0 before 10.11.4 from 10.12.0 before 10.12.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://mattermost.com/security-updates
- https://github.com/advisories/GHSA-ff85-qw3h-g9vp
- https://nvd.nist.gov/vuln/detail/CVE-2025-55073
- https://github.com/mattermost/mattermost/commit/375ce229f4923205394d8f27925372b2cbf28130
- https://github.com/mattermost/mattermost/commit/6c288aa62bb3343183ec1d0a06360d14aa0193e9
- https://github.com/mattermost/mattermost/commit/a41db04d2746ab549d056db4ede4cd803f64989c
- https://github.com/mattermost/mattermost/commit/b822cea06bf5683a176e2c92711241bd29cd9389
- https://github.com/mattermost/mattermost/commit/e47349ea0fc072ee1dfb196d9bb1c8fd1a589224