CVE-2025-54478

Unauthenticated Channel Subscription Edit in Mattermost Confluence Plugin

Published Aug 11, 2025 CVSS 3.1 · 7.2 High EPSS < 1% KEV · Not listed
Description
Mattermost Confluence Plugin version <1.5.0 fails to enforce authentication of the user to the Mattermost instance which allows unauthenticated attackers to edit channel subscriptions via API call to the edit channel subscription endpoint.

Remediation

Vendor Solution

Update Mattermost Confluence Plugin to version 1.5.0 or higher.

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
EUVD EUVD EUVD-2025-24171 Mattermost Confluence Plugin is Missing Authentication for Critical Function
Github GHSA Github GHSA GHSA-qpjq-c5hr-7925 Mattermost Confluence Plugin is Missing Authentication for Critical Function
References
History
Type Values Removed Values Added
First Time appeared Mattermost confluence
CPEs cpe:2.3:a:mattermost:confluence:*:*:*:*:*:*:*:*
Vendors & Products Mattermost confluence
Type Values Removed Values Added
First Time appeared Mattermost
Mattermost mattermost
Vendors & Products Mattermost
Mattermost mattermost
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Mattermost Confluence Plugin version <1.5.0 fails to enforce authentication of the user to the Mattermost instance which allows unauthenticated attackers to edit channel subscriptions via API call to the edit channel subscription endpoint.
Title Unauthenticated Channel Subscription Edit in Mattermost Confluence Plugin
Weaknesses CWE-306
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Mattermost
Published
Updated
Aug 11, 2025, 7:40 PM
Reserved
Jul 28, 2025, 2:26 PM
Status
Analyzed
Published
Aug 11, 2025, 7:15 PM
Modified
Jun 17, 2026, 9:40 AM