MEDIUM 5.4 Go
Mattermost allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL
GHSA-ff85-qw3h-g9vp · CVE-2025-55073 · GO-2025-4129
Published · Modified
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Description
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.
References
- ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2025-55073
- WEB https://github.com/mattermost/mattermost/commit/375ce229f4923205394d8f27925372b2cbf28130
- WEB https://github.com/mattermost/mattermost/commit/6c288aa62bb3343183ec1d0a06360d14aa0193e9
- WEB https://github.com/mattermost/mattermost/commit/a41db04d2746ab549d056db4ede4cd803f64989c
- WEB https://github.com/mattermost/mattermost/commit/b822cea06bf5683a176e2c92711241bd29cd9389
- WEB https://github.com/mattermost/mattermost/commit/e47349ea0fc072ee1dfb196d9bb1c8fd1a589224
- PACKAGE https://github.com/mattermost/mattermost
- WEB https://mattermost.com/security-updates
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