Vulnerability · Published Aug 11, 2025 · Assigned by Mattermost
CVE-2025-54463Unexpected Input to Cloud Webhook endpoint Causes DoS in Mattermost Confluence Plugin
Medium 5.9
In plain English
A medium-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 0.3% (higher than 26% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)0.3%top 74.4% 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 server webhook 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-gjpm-6w34-ppvf |
| Go | github.com/mattermost/mattermost-plugin-confluence | 1.5.0 | GO-2025-3866 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost Confluence Plugin | 0 – before 1.5.0 |
Weakness: CWE-754 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H