CVE-2025-54458: Mattermost Confluence

Medium severity, CVSS 5.0. EPSS: 0.2% chance of exploitation in the next 30 days.

Mattermost Confluence Plugin version <1.5.0 fails to check the access of the user to the Confluence space which allows attackers to create a subscription for a Confluence space the user does not have access to via the create subscription endpoint.

Affected products

• Mattermost Confluence: before 1.5.0 (fixed in 1.5.0)

Published 2025-08-11. Last modified 2026-06-17.