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How the CVE Works
CVE-2025-33121 is an XML External Entity (XXE) vulnerability in IBM QRadar SIEM versions 7.5 through 7.5.0 Update Package 12. The flaw occurs when the application processes malicious XML input without proper validation. An attacker can craft a specially designed XML payload containing external entity references, which the parser resolves, leading to unauthorized data exposure (e.g., file reads) or server-side request forgery (SSRF). The attack exploits misconfigured XML parsers that fail to disable external entity resolution, allowing attackers to exfiltrate sensitive system files or trigger denial-of-service via resource exhaustion.
DailyCVE Form
Platform: IBM QRadar SIEM
Version: 7.5 – 7.5.0 Update 12
Vulnerability: XXE Injection
Severity: Critical
Date: 07/25/2025
Prediction: Patch by Q3 2025
What Undercode Say
Analytics:
curl -X POST -H "Content-Type: text/xml" --data "@malicious.xml" http://target/qradar/endpoint
<!DOCTYPE foo [ <!ENTITY xxe SYSTEM "file:///etc/passwd"> ]> <foo>&xxe;</foo>
Exploit:
- Craft malicious XML with external entities.
- Submit payload to vulnerable QRadar endpoint.
- Retrieve sensitive data via response/errors.
Protection from this CVE:
- Disable DTD/external entities in XML parsers.
- Apply IBM QRadar patches immediately.
- Use input validation/firewall rules.
Impact:
- Data exfiltration (e.g., config files).
- Denial-of-Service (memory exhaustion).
- SSRF attacks.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
