Vulnerability · Published Aug 11, 2025 · Assigned by Mattermost
CVE-2025-54525Unexpected input to Create Channel Subscription endpoint causes DoS in Mattermost Confluence Plugin
High 7.5
In plain English
A high-severity security flaw 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 0.4% (higher than 31% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.4%top 69.1% 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 handle unexpected request body which allows attackers to crash the plugin via constant hit to create channel subscription endpoint with an invalid request body.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/mattermost/mattermost-plugin-confluence | 1.5.0 | GHSA-3cg3-3mmr-w8hj |
| Go | github.com/mattermost/mattermost-plugin-confluence | 1.5.0 | GO-2025-3872 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost Confluence Plugin | 0 – before 1.5.0 |
Weakness: CWE-1287 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H