CVE-2025-2905
📋 TL;DR
This CVE describes an XML External Entity (XXE) vulnerability in multiple WSO2 products due to improper XML parser configuration. It allows remote unauthenticated attackers to read sensitive server files or cause denial-of-service. Organizations using affected WSO2 products are at risk.
💻 Affected Systems
- Multiple WSO2 products (specific list in vendor advisory)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete server compromise including exfiltration of sensitive files (passwords, configuration files, system files) and persistent DoS rendering services unavailable.
Likely Case
Unauthorized reading of sensitive configuration files and temporary service disruption through DoS attacks.
If Mitigated
Limited impact with proper network segmentation, WAF filtering, and minimal exposed attack surface.
🎯 Exploit Status
XXE vulnerabilities are well-understood with many existing exploitation tools and techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: See vendor advisory for specific patched versions
Vendor Advisory: https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2025/WSO2-2025-3993/
Restart Required: Yes
Instructions:
1. Review vendor advisory for affected products/versions. 2. Apply vendor-provided patches. 3. Restart affected services. 4. Verify fix implementation.
🔧 Temporary Workarounds
Disable XXE in XML parser
allConfigure XML parsers to disable external entity resolution
Configure XML parser properties: set javax.xml.accessExternalDTD to 'none', set FEATURE_SECURE_PROCESSING to true
Input validation and filtering
allImplement strict input validation to reject XML containing external entity declarations
Implement XML schema validation or regex filtering for DOCTYPE declarations
🧯 If You Can't Patch
- Implement network segmentation to isolate vulnerable systems
- Deploy WAF with XXE protection rules and strict input validation
🔍 How to Verify
Check if Vulnerable:
Check WSO2 product version against affected versions in vendor advisoryCheck Version:
Check WSO2 product documentation for version check command specific to each productVerify Fix Applied:
Verify patched version is installed and test with safe XXE payloads📡 Detection & Monitoring
Log Indicators:
- XML parsing errors
- Unusual file access patterns
- Large XML payloads with DOCTYPE declarations
Network Indicators:
- HTTP requests containing XML with external entity references
- Outbound connections to unexpected external resources
SIEM Query:
source="*wso2*" AND ("DOCTYPE" OR "SYSTEM" OR "ENTITY")