Vulnerability · Published Aug 11, 2025 · Assigned by Mattermost
CVE-2025-44004Unauthenticated Channel Subscription Creation in Mattermost Confluence Plugin
High 7.2
In plain English
A high-severity missing authentication in Mattermost Confluence Plugin from Mattermost. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.2High
Exploit odds (30 days)0.2%top 87.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/mattermost/mattermost-plugin-confluence | 1.5.0 | GHSA-6ff3-jgxh-vffj |
| Go | github.com/mattermost/mattermost-plugin-confluence | 1.5.0 | GO-2025-3865 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost Confluence Plugin | 0 – before 1.5.0 |
Weakness: CWE-306 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N