testing-for-xxe-injection-vulnerabilities

HIGH W007: Insecure credential handling detected in skill instructions.

• Insecure credential handling detected (high risk: 1.00). The skill explicitly instructs crafting XXE payloads to read and exfiltrate sensitive files (e.g., /etc/passwd, config.php) and to include "Files Retrieved" / contents in findings, which would require the agent to capture and output secret values verbatim.

CRITICAL E005: Suspicious download URL detected in skill instructions.

• Suspicious download URL detected (high risk: 1.00). Yes — the list contains attacker-controlled callback/exfiltration domains (abc123.oast.fun, attacker.example.com), an explicit malicious DTD/download URL, and an exploit GitHub repo (enjoiz/XXEinjector) alongside SSRF/metadata targets, which are strong indicators these URLs are used to host or deliver malicious payloads or exploit tooling.

CRITICAL E006: Malicious code pattern detected in skill scripts.

• Malicious code pattern detected (high risk: 1.00). The content and agent script explicitly implement and automate deliberate data-exfiltration and SSRF techniques (external DTDs, OOB HTTP/DNS/FTP callbacks, php://filter base64 reads, cloud metadata access, hosting "evil.dtd" and attacker-controlled endpoints) to retrieve sensitive files and send them to attacker domains — i.e., operational malicious/abuse functionality rather than mere vulnerability description.

MEDIUM W011: Third-party content exposure detected (indirect prompt injection risk).

• Third-party content exposure detected (high risk: 0.90). The agent (scripts/agent.py) sends HTTP requests to arbitrary user-supplied base_url endpoints (and may reference external OOB/DTD hosts as shown in SKILL.md) and directly reads/inspects resp.text to determine findings, so untrusted third-party responses can materially influence its decisions.