Headline
GHSA-vww6-79rv-3j4x: Mattermost doesn't verify that post actions invoking `/share-issue-publicly` were created by the Jira plugin
Mattermost versions 11.1.x <= 11.1.0, 11.0.x <= 11.0.5, 10.12.x <= 10.12.3, 10.11.x <= 10.11.7 fail to verify that post actions invoking /share-issue-publicly were created by the Jira plugin which allowed a malicious Mattermost user to exfiltrate Jira tickets when victim users interacted with affected posts
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- GitHub Advisory Database
- GitHub Reviewed
- CVE-2025-64641
Mattermost doesn’t verify that post actions invoking `/share-issue-publicly` were created by the Jira plugin
Moderate severity GitHub Reviewed Published Dec 24, 2025 to the GitHub Advisory Database • Updated Dec 26, 2025
Package
gomod github.com/mattermost/mattermost-server (Go)
Affected versions
>= 10.11.0, < 10.11.8
>= 10.12.0, < 10.12.4
>= 11.0.0, < 11.0.6
>= 11.1.0, < 11.1.1
Patched versions
10.11.8
10.12.4
11.0.6
11.1.1
gomod github.com/mattermost/mattermost/server/v8 (Go)
< 8.0.0-20251121122154-b57c297c6d7
8.0.0-20251121122154-b57c297c6d7
Description
Published to the GitHub Advisory Database
Dec 24, 2025
Last updated
Dec 26, 2025