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How the CVE Works:
The vulnerability occurs when an attacker uploads a profile picture exceeding the 300KB limit in Liferay Portal (7.4.3.0–7.4.3.132) or Liferay DXP (2025.Q1.0–2025.Q1.8, 2024.Q4.0–2024.Q4.7, etc.). The system fails to enforce strict file size validation, allowing oversized uploads that consume excessive server resources. This leads to degraded performance or complete service unavailability due to resource exhaustion. The flaw stems from improper input sanitization in the file upload handler, permitting maliciously crafted large files to bypass intended restrictions.
DailyCVE Form:
Platform: Liferay Portal/DXP
Version: 7.4.3.0–7.4.3.132
Vulnerability: DoS via File Upload
Severity: Moderate
Date: Aug 12, 2025
Prediction: Patch by Sep 2025
What Undercode Say:
Check Liferay version: curl -I http://<liferay-host>/api/jsonws/version Exploit PoC (simulate large upload): curl -F "file=@large_image.jpg" http://<liferay-host>/upload-handler
How Exploit:
- Attacker uploads >300KB file.
- Server processes oversized payload.
- Resource exhaustion triggers DoS.
Protection from this CVE:
- Apply patches: 2025.Q1.9 / 2024.Q1.17.
- Enforce client/server-side size checks.
- Rate-limit file uploads.
Impact:
- Service degradation.
- Unauthorized DoS attacks.
- Operational disruption.
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Sources:
Reported By: github.com
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