CVE-2025-9076
MEDIUM EPSS 15.3%
Published Sep 15, 20259mo ago · Modified Jun 17, 20261w ago
6.5 CVSS 3.1
Published Sep 15, 2025 9mo ago
Last Modified Jun 17, 2026 1w ago
Description
Mattermost versions 10.10.x <= 10.10.1 fail to properly sanitize user data during shared channel membership synchronization, which allows malicious or compromised remote clusters to access sensitive user information via unsanitized user objects. This vulnerability affects Mattermost Server instances with shared channels enabled.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None
Threat Intelligence
EPSS Exploit Probability
15.3% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-862 Missing Authorization Authorization
Affected Products 1
| Vendor | Product | Version | Range |
|---|---|---|---|
| mattermost | mattermost_server | * | ≥10.10.0 – <10.10.2 |
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.