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The CVE-2025-XXXX vulnerability in the Mattermost Confluence Plugin (versions < 1.5.0) arises due to improper validation of incoming webhook request bodies. The plugin fails to handle malformed or unexpected input, leading to a denial-of-service (DoS) condition. Attackers can exploit this by repeatedly sending specially crafted invalid payloads to the webhook endpoint, causing the plugin to crash. The lack of proper error handling for unusual conditions allows unauthenticated remote attackers to disrupt service availability.
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Platform: Mattermost Confluence Plugin
Version: < 1.5.0
Vulnerability: DoS via Webhook
Severity: Moderate
Date: Aug 11, 2025
Prediction: Patch by Sep 2025
What Undercode Say
curl -X POST -d "malformed_data" http://target/webhook
import requests
while True:
requests.post("http://target/webhook", data="invalid")
How Exploit
Send malformed payloads repeatedly to crash the plugin.
Protection from this CVE
Update to v1.5.0.
Impact
Service disruption via DoS.
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Sources:
Reported By: github.com
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Undercode
