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soap-api-security

SOAP web service security testing — WSDL analysis, XXE and XML injection, SOAPAction spoofing, WS-Security bypass, XPath injection, and entity-expansion abuse with fault-and-data differential evidence

internal/tools/skills/data/api-security/soap-api-security/SKILL.md

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# SOAP Web Service Security Testing

## Purpose
Exploit SOAP services: XML attacks through the envelope (XXE, XPath/XSLT injection, entity expansion), operation routing confusion (SOAPAction spoofing), and WS-Security implementation failures.

## Preconditions
- Service endpoint URL and WSDL access (append `?wsdl` to typical service paths)
- SOAP client tooling: curl with crafted envelopes, Python requests, SoapUI (optional)
- Understanding of the SOAP version (1.1 vs 1.2) in use (affects headers)

## Attack Surface Signals
- WSDL disclosures with full operation/parameter schemas
- `Content-Type: text/xml` / `application/soap+xml` endpoints
- SOAPAction headers, WS-Security UsernameTokens, SAML assertions in headers