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CVE-2025-9076

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CVE-2025-9076

Published: Sep 15, 2025

Modified: Sep 15, 2025

PUBLISHED

CVSS v3.1

6.5

MEDIUM

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.

VendorProductVersions

Mattermost

Mattermost

affected
10.10.0 - <= 10.10.1
unaffected
10.11.0
unaffected
10.10.2

Weaknesses (CWE)

CWE-862

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

References

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