CVE-2025-30753
📋 TL;DR
This vulnerability in Oracle WebLogic Server allows authenticated attackers with low privileges to cause a denial of service (DoS) by crashing or hanging the server via HTTP requests. It affects WebLogic Server versions 12.2.1.4.0, 14.1.1.0.0, and 14.1.2.0.0. Organizations running these versions with network-accessible WebLogic instances are at risk.
💻 Affected Systems
- Oracle WebLogic Server
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete unavailability of WebLogic Server and all hosted applications, requiring manual restart and causing extended service disruption.
Likely Case
Intermittent or sustained DoS affecting application availability, potentially requiring server restarts and impacting business operations.
If Mitigated
Minimal impact if proper network segmentation and access controls prevent low-privileged users from reaching vulnerable endpoints.
🎯 Exploit Status
CVSS indicates low attack complexity (AC:L) and requires low privileges (PR:L). No public exploit details available as of analysis.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply Critical Patch Update (CPU) July 2025 or later
Vendor Advisory: https://www.oracle.com/security-alerts/cpujul2025.html
Restart Required: Yes
Instructions:
1. Download appropriate patches from Oracle Support. 2. Apply patches following Oracle's WebLogic patching procedures. 3. Restart WebLogic Server instances. 4. Verify patch application.
🔧 Temporary Workarounds
Network Access Restriction
allRestrict HTTP access to WebLogic Server to trusted networks only
Configure firewall rules to limit source IPs
Use network security groups/ACLs
Authentication Hardening
allImplement stronger authentication controls and limit low-privileged accounts
Review and restrict user privileges
Implement multi-factor authentication
🧯 If You Can't Patch
- Implement strict network segmentation to isolate WebLogic servers from untrusted networks
- Deploy Web Application Firewall (WAF) with DoS protection rules
🔍 How to Verify
Check if Vulnerable:
Check WebLogic version via console or command: java weblogic.versionCheck Version:
java weblogic.versionVerify Fix Applied:
Verify patch application through Oracle CPU documentation and version check📡 Detection & Monitoring
Log Indicators:
- Multiple HTTP requests from single low-privileged user causing server instability
- WebLogic crash logs or hang detection
Network Indicators:
- Unusual HTTP traffic patterns to WebLogic endpoints
- Increased error responses
SIEM Query:
source="weblogic" AND (event_type="crash" OR event_type="hang" OR error_code="500")