BaseFortify

Publication date: 2025-11-18

Last updated on: 2025-11-25

Assigner: Mattermost, Inc.

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

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2025-11-18

Last Modified

2025-11-25

Generated

2026-07-06

AI Q&A

2025-11-18

EPSS Evaluated

2026-07-05

NVD

CVE-2025-55074

Affected Vendors & Products

Vendor	Product	Version / Range
mattermost	mattermost_server	From 10.5.0 (inc) to 10.5.12 (exc)
mattermost	mattermost_server	From 10.11.0 (inc) to 10.11.4 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-NVD-CWE-noinfo

Attack-Flow Graph

Executive Summary

This vulnerability exists in Mattermost versions 10.11.x up to 10.11.3 and 10.5.x up to 10.5.11, where the software fails to enforce access permissions on the Agents plugin. This flaw allows users to determine when other users have read channels by accessing channel member objects, which should normally be restricted.

Impact Analysis

The vulnerability can impact you by allowing unauthorized users to gain information about when other users have read certain channels. This could lead to privacy concerns or information disclosure about user activity within the platform, although it does not allow modification or deletion of data.

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