CVE-2025-55074

LowCVSS 3.5/10Last modified Oct 19, 2026

Description

Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11 fail to enforce access permissions on the Agents plugin which allows other users to determine when users had read channels via channel member objects

Metrics

CVSS 3.1 3.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N

Affected software

Vendor	Product	Versions
Mattermost	Mattermost	>= 10.11.0, <= 10.11.3; >= 10.5.0, <= 10.5.11

References

https://mattermost.com/security-updatesVendor Advisory

Timeline

Published: Nov 18, 2025
Last modified: Oct 19, 2026
NVD status: Analyzed

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