medium4.1
CVE-2025-64641
Mattermost doesn't verify that post actions invoking `/share-issue-publicly` were created by the Jira plugin
Impact
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
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost/server/v8 | < 8.0.0-20251121122154-b57c297c6d7 | 8.0.0-20251121122154-b57c297c6d7 |
| go | github.com/mattermost/mattermost-server | >= 10.11.0, < 10.11.8 | 10.11.8 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mattermost | Mattermost Server | from 10.11.0 before 10.11.8 from 10.12.0 before 10.12.4 from 11.0.0 before 11.0.6 from 11.1.0 before 11.1.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://mattermost.com/security-updates
- https://github.com/advisories/GHSA-vww6-79rv-3j4x
- https://nvd.nist.gov/vuln/detail/CVE-2025-64641
- https://github.com/mattermost/mattermost/pull/34551
- https://github.com/mattermost/mattermost/commit/b57c297c6d7ae6812d85e32a625806ac9555deee
- https://pkg.go.dev/vuln/GO-2026-4260