vuln-xxe

Test XML parsers for insecure external entity resolution using canary files.

Updated Jul 30, 2026
One-click install
npx skills add https://github.com/salmanabdurrahman/pi-pentest-agent --skill vuln-xxe
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: vuln-xxe
Source: https://github.com/salmanabdurrahman/pi-pentest-agent/tree/main/skills/vuln-xxe
Command: npx skills add https://github.com/salmanabdurrahman/pi-pentest-agent --skill vuln-xxe

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This skill provides a structured, safe, and authorized methodology for identifying XML external entity (XXE) injection vulnerabilities in web applications without risking data exposure or system instability.

Core Features & Use Cases

  • Safe Canary Testing: Uses non-sensitive canary files like /etc/hostname to confirm parser vulnerabilities without accessing sensitive system data.
  • OOB Detection: Supports blind XXE detection via DNS and HTTP callbacks to identify vulnerabilities where no direct output is returned.
  • Multi-Vector Analysis: Covers classic file-read, XInclude, and SVG-based XXE injection techniques.

Quick Start

Use the vuln-xxe skill to perform a safe canary file read test on the target XML endpoint identified in your scope.

Frequently Asked Questions about vuln-xxe

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I test for XML external entity injection safely without exposing sensitive data?

XML external entity (XXE) injection testing can be performed safely by using non-sensitive canary files like /etc/hostname to confirm parser vulnerabilities without accessing sensitive system data. This approach prevents data exposure while validating insecure entity resolution.

What is blind XXE detection and how does out-of-band monitoring work?

Blind XXE detection identifies vulnerabilities where no direct output is returned by using out-of-band (OOB) monitoring via DNS and HTTP callbacks. This technique confirms insecure XML entity resolution by observing external network interactions triggered by the parser.

How do I validate XML external entity vulnerabilities in SOAP APIs and SAML endpoints?

You validate XML external entity vulnerabilities in SOAP APIs and SAML endpoints by testing XML parsers for insecure entity resolution. This involves applying structured injection techniques to the XML-processing endpoints identified in your security assessment scope.

What vectors are used for XML external entity injection testing?

XML external entity injection testing uses multiple vectors including classic file-read, XInclude, and SVG-based injection techniques. These methods test XML parsers for insecure entity resolution across different XML-based formats processed by the target application.

Can I use canary file reads to confirm XML parser vulnerabilities?

Yes, you can use canary file reads to confirm XML parser vulnerabilities safely. By targeting non-sensitive files like /etc/hostname, you can verify insecure entity resolution and validate XML external entity vulnerabilities without risking system instability or data exposure.