CVE-2025-12559
Last modified
CVE-2025-12559 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to sanitize team email addresses to be visible only to Team Admins, which allows any authenticated user to view team email addresses via the GET /api/v4/channels/{channel_id}/common_teams endpoint. EPSS estimates a 0.18% chance of exploitation in the next 30 days.
Description
Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to sanitize team email addresses to be visible only to Team Admins, which allows any authenticated user to view team email addresses via the GET /api/v4/channels/{channel_id}/common_teams endpoint
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost Server | >= 10.5.0, < 10.5.13 |
| Mattermost | Mattermost Server | >= 10.11.0, < 10.11.5 |
| Mattermost | Mattermost Server | >= 10.12.0, < 10.12.2 |
| Mattermost | Mattermost Server | >= 11.0.0, < 11.0.3 |
References
- https://mattermost.com/security-updatesVendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2025-12559?
How severe is CVE-2025-12559?
How do I fix CVE-2025-12559?
Are you affected by CVE-2025-12559?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST