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The CVE-2025-XXXXX vulnerability in the Mattermost Confluence Plugin (versions < 1.5.0) stems from improper validation of unusual or exceptional conditions in webhook request processing. When the plugin receives malformed or unexpected request bodies at its webhook endpoint, it fails to implement proper error handling, leading to a server crash due to uncaught exceptions. Attackers can exploit this by sending repeated specially crafted POST requests containing invalid JSON or oversized payloads, causing denial-of-service (DoS) conditions. The plugin does not enforce proper input sanitization or implement rate-limiting, making it susceptible to brute-force crashing attempts.
DailyCVE Form:
Platform: Mattermost Plugin
Version: <1.5.0
Vulnerability: DoS crash
Severity: Moderate
Date: Aug 11, 2025
Prediction: Patch by Sep 2025
What Undercode Say:
curl -X POST -H "Content-Type: application/json" -d '{"malformed":}' http://target/webhook
import requests
while True:
requests.post("http://target/webhook", data="INVALID")
How Exploit:
- Send malformed JSON payloads
- Flood webhook endpoint
- Trigger unhandled exceptions
Protection from this CVE:
- Upgrade to v1.5.0
- Implement input validation
- Add rate-limiting
Impact:
- Service disruption
- Plugin instability
- DoS susceptibility
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Sources:
Reported By: github.com
Extra Source Hub:
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