Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add blacklanternsecurity/red-run --skill xxegit clone --depth 1 https://github.com/blacklanternsecurity/red-runWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/blacklanternsecurity/red-run/xxe)<a href="https://agentmods.dev/skills/blacklanternsecurity/red-run/xxe"><img src="https://agentmods.dev/badge/skills/blacklanternsecurity/red-run/xxe.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00018 | $0.03837 |
| Opus 5 | $0.00009 | $0.01919 |
| Sonnet 5 | $0.00004 | $0.00767 |
| Haiku 4.5 | $0.00002 | $0.00384 |
Grade C, and why
xxe scanned grade C with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Reaches for credential filesmediumPrivilege escalation
SSH keys, cloud credentials, git-credentials, .npmrc, /etc/shadow: reading these is how a config file becomes a credential leak.
`/home/<user>/.ssh/id_rsa`, `/var/www/html/config.php` Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
Cloud metadata endpointmediumServer-side request forgery
One request to 169.254.169.254 can return temporary IAM credentials.
<!ENTITY xxe SYSTEM "http://169.254.169.254/latest/meta-data/iam/security-credentials/"> Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.
The source is not reproduced here
Licensed GPL-3.0
The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 5d ago First seen · 454 lines · 18 tokens per session scan C 27eb963779aa
xxe is a skill published in the GitHub repository blacklanternsecurity/red-run (267 stars, last pushed 5mo ago), licensed GPL-3.0. It adds 18 tokens to every session and 3,837 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it C with 2 findings (reaches for credential files, cloud metadata endpoint). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
Other skills, from other repositories
performing-soap-web-service-security-testing
Perform security testing of SOAP web services by analyzing WSDL definitions and testing for XML injection, XXE, WS-Security bypass, and SOAPAction spoofing.
testing-for-xxe-injection-vulnerabilities
Discovering and exploiting XML External Entity injection vulnerabilities to read server files, perform SSRF, and exfiltrate data during authorized penetration tests.
performing-soap-web-service-security-testing
Perform security testing of SOAP web services by analyzing WSDL definitions and testing for XML injection, XXE, WS-Security bypass, and SOAPAction spoofing.
testing-for-xxe-injection-vulnerabilities
Discovering and exploiting XML External Entity injection vulnerabilities to read server files, perform SSRF, and exfiltrate data during authorized penetration tests.
testing-for-xml-injection-vulnerabilities
Test web applications for XML injection vulnerabilities including XXE, XPath injection, and XML entity attacks to identify data exposure and server-side request forgery risks.
xxe-poc
Exploit XML External Entity (XXE) vulnerabilities to read local files, perform SSRF attacks, and exfiltrate data. XXE occurs when XML parsers process external entity declarations in user-supplied XML input without proper restrictions.