Mattermost Plugin MSTeams versions <2.1.0 and Mattermost Server versions 10.5.x <=10.5.1 with the MS Teams plugin enabled fail to perform constant time comparison on a MSTeams plugin webhook secret which allows an attacker to retrieve the webhook secret of the MSTeams plugin via a timing attack during webhook secret comparison.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| github.com/mattermost/mattermost/server/v8(Go) | 10.5.0 | 10.5.2 | N/A |
| github.com/mattermost/mattermost/server/v8(Go) | 0 | 8.0.0-20250314142426-c049748b8863 | N/A |
| github.com/mattermost/mattermost-plugin-msteams(Go) | 0 | 2.1.0 | N/A |
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