CVE-2025-44004

Unauthenticated Channel Subscription Creation in Mattermost Confluence Plugin

CVSS 7.2 HIGHEPSS 0.2%CWE-306

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.2EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

11 Aug 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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

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

Affected products

Mattermost · Mattermost Confluence Plugin

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References

https://mattermost.com/security-updates