Missing Authorization Affecting github.com/mattermost/mattermost/server/channels/app package, versions >=10.11.0 <10.11.10>=11.1.0 <11.1.3>=11.2.0 <11.2.2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-GOLANG-GITHUBCOMMATTERMOSTMATTERMOSTSERVERCHANNELSAPP-15304331
- published17 Feb 2026
- disclosed16 Feb 2026
- creditHarrison Healey
Introduced: 16 Feb 2026
CVE-2025-14350 (opens in a new tab)How to fix?
Upgrade github.com/mattermost/mattermost/server/channels/app to version 10.11.10, 11.1.3, 11.2.2 or higher.
Overview
github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative
Affected versions of this package are vulnerable to Missing Authorization when processing channel mentions. An attacker can access information about the existence of teams and their URL names by posting channel shortlinks and observing the channel_mentions property in the API response.