CVE-2025-12559
MEDIUM EPSS 8.5%
Published Nov 27, 20257mo ago · Modified Jun 17, 20262w ago
4.3 CVSS 3.1
Published Nov 27, 2025 7mo ago
Last Modified Jun 17, 2026 2w ago
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
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity None
Availability None
Threat Intelligence
EPSS Exploit Probability
8.5% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor Information Exposure
Affected Products 4
| Vendor | Product | Version | Range |
|---|---|---|---|
| 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 1
- mattermost.com https://mattermost.com/security-updates
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.