Missing Authorization Affecting github.com/mattermost/mattermost/server/platform/services/sharedchannel package, versions >=10.10.0 <10.10.2-rc2
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-GITHUBCOMMATTERMOSTMATTERMOSTSERVERPLATFORMSERVICESSHAREDCHANNEL-12709420
- published16 Sept 2025
- disclosed15 Sept 2025
- creditUnknown
Introduced: 15 Sep 2025
NewCVE-2025-9076 (opens in a new tab)How to fix?
Upgrade github.com/mattermost/mattermost/server/platform/services/sharedchannel to version 10.10.2-rc2 or higher.
Overview
Affected versions of this package are vulnerable to Missing Authorization via the syncMembershipBatchToRemotesn function in the membership.go file . An attacker can access sensitive user information by leveraging unsanitized user objects from malicious or compromised remote clusters.
Note: This is exploitable if shared channels are enabled.