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The CVE-2025-XXXXX vulnerability in Mattermost Confluence Plugin (< v1.5.0) arises due to improper validation of input types in the “create channel subscription” endpoint. When an attacker sends malformed or unexpected request bodies (e.g., non-JSON payloads or invalid field types), the plugin fails to handle these inputs gracefully, leading to repeated crashes. This flaw enables denial-of-service (DoS) conditions by exhausting system resources through continuous malicious requests. The lack of server-side input sanitization allows unauthenticated or low-privilege users to disrupt service availability.
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Platform: Mattermost Confluence Plugin
Version: < 1.5.0
Vulnerability: DoS via input mishandling
Severity: High
Date: Aug 12, 2025
Prediction: Patch by Aug 25, 2025
What Undercode Say
Analytics:
curl -X POST /api/v1/subscriptions -H "Content-Type: application/json" -d '{"invalid":"payload"}'
import requests
requests.post("http://target/api/v1/subscriptions", json={"malformed": True})
How Exploit:
- Send malformed JSON to
/api/v1/subscriptions. - Trigger repeated crashes via invalid types.
- Exploit unauthenticated access if misconfigured.
Protection from this CVE:
- Upgrade to v1.5.0.
- Implement input validation.
- Rate-limit API endpoints.
Impact:
- Service disruption.
- Resource exhaustion.
- Unauthorized DoS.
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Sources:
Reported By: github.com
Extra Source Hub:
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