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Status published
High
CVE-2025-54478
Unauthenticated Channel Subscription Edit in Mattermost Confluence Plugin
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- Lorenzo Gallegos
References
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Affected Vendor
Mattermost
View all reports →Affected Software
Mattermost Confluence Plugin
Vulnerable Versions:
0, 1.5.0
Timeline
Official Publish:
August 11th, 2025
Last Modified:
August 11th, 2025
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N