XX

A security skill for testing and detecting XXE injection vulnerabilities in XML-processing applications.

Install

mkdir -p .claude/skills/xxe-testing && curl -L -o skill.zip "https://agentskills.codes/api/skills/download/2577" && unzip -o skill.zip -d .claude/skills/xxe-testing && rm skill.zip

Installs to .claude/skills/xxe-testing

Activation

This is the description your AI agent reads to decide when to run this skill — the better it matches your request, the more reliably it fires.

XXE XML外部实体注入测试的专业技能和方法论
24 charsno explicit “when” trigger
Intermediate

Key capabilities

  • Identify XML input points in APIs and file uploads
  • Test for SSRF by triggering network requests via XML entities
  • Perform blind XXE detection using parameter entities
  • Execute local file read attacks using system entities
  • Conduct Billion Laughs denial of service testing
  • Bypass filters using different protocols like PHP or Java

How it works

The skill utilizes XML parsers to process external entities, allowing the retrieval of local files or the execution of network requests. It use DTD declarations to define entities that the parser resolves during document processing.

Inputs & outputs

You give it
XML payload containing external entity definitions
You get back
Extracted file contents or server response indicating SSRF

When to use xxe-testing

  • Audit XML parsing for security flaws
  • Test for SSRF via XML entities
  • Verify file read vulnerability
  • Check SOAP services for XXE

About xxe-testing

This skill provides a structured methodology for identifying and testing XXE vulnerabilities. It helps developers locate insecure XML parsing points and provides payloads for testing SSRF and file access.

XXE XML外部实体注入测试的专业技能和方法论

When not to use it

  • Testing without explicit authorization

Limitations

  • Requires XML parser to be configured to process external entities
  • Blind XXE requires an out-of-band server to capture exfiltrated data

How it compares

This approach provides a structured methodology for identifying and exploiting XML parsing vulnerabilities compared to manual, ad-hoc testing.

Compared to similar skills

xxe-testing side by side with the closest alternatives in the catalog.

SkillInstallsUpdatedSafetyDifficulty
xxe-testing (this skill)27moReviewIntermediate
reverse-engineering-tools734moNo flagsAdvanced
game-hacking-techniques422moNo flagsAdvanced
solidity-security152moNo flagsIntermediate

Try saying

Example prompts that trigger this skill in your AI assistant.

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