CVE-2025-9076 — Mattermost Server exposes sensitive user credentials during shared channel membership synchronization
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 cluster…
Published: 2025-09-15 · CVSS: 6.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7