CVE-2025-8285 MEDIUM

CVE-2025-8285: Unauthorized Channel Subscription Creation in Mattermost Confluence Plugin

Vendor Mattermost
Product Mattermost Confluence Plugin
Weakness CWE-862 · Missing authorization
Published August 11, 2025
Last update August 11, 2025
View on NVD All CVEs

CVSS base score

4.0/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N

What the vulnerability does

01Description

Mattermost Confluence Plugin version <1.5.0 fails to check the access of the user to the channel which allows attackers to create channel subscription without proper access to the channel via API call to the create channel subscription endpoint.

Key dates

02Disclosure timeline

August 11, 2025 CVE published
August 11, 2025 Record updated