Incorrect Implementation of Authentication Algorithm Affecting github.com/mattermost/mattermost/server/channels/app package, versions >=10.5.0 <10.5.13>=10.11.0 <10.11.5>=10.12.0 <10.12.2>=11.0.0-alpha.1 <11.0.4
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMMATTERMOSTMATTERMOSTSERVERCHANNELSAPP-14147531
- published28 Nov 2025
- disclosed27 Nov 2025
- creditdaw10
Introduced: 27 Nov 2025
NewCVE-2025-12419 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade github.com/mattermost/mattermost/server/channels/app to version 10.5.13, 10.11.5, 10.12.2, 11.0.4 or higher.
Overview
github.com/mattermost/mattermost/server/channels/app is a private-cloud Slack alternative
Affected versions of this package are vulnerable to Incorrect Implementation of Authentication Algorithm due to improper validation of OAuth state tokens during the OpenID Connect authentication process. An attacker can gain unauthorized access to any user account by manipulating authentication data during the OAuth completion flow.