Mend.io Vulnerability Database

What is a CVE vulnerability ID? icon What is a WS vulnerability ID? icon What is an MSC vulnerability ID? icon
New vulnerability? Tell us about it!
icon

We found results for “”

CVE-2025-9076

Good to know:

icon

Date: September 15, 2025

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.

Severity Score

Related Resources (5)

https://nvd.nist.gov/vuln/detail/CVE-2025-9076
https://github.com/advisories/GHSA-3vcm-c42p-3hhf
https://github.com/mattermost/mattermost
https://mattermost.com/security-updates
https://www.mend.io/vulnerability-database/CVE-2025-9076

Severity Score

Weakness Type (CWE)

Missing Authorization

CWE-862

Top Fix

icon

Upgrade Version

Upgrade to version github.com/mattermost/mattermost - v10.10.2;github.com/mattermost/mattermost/server/v8 - v8.0.0-20250729073403-517ae758cd02;github.com/mattermost/mattermost-server - v10.10.2+incompatible

Learn More

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): HIGH
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): NONE

Do you need more information?

Contact Us