web-subdomain-takeover
Subdomain takeover via dangling DNS/CNAME — GitHub Pages, Heroku, Azure, Fastly, Shopify, Netlify, Surge, Tumblr, Beanstalk, Zendesk, etc.
60
71%
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Critical
Do not install without reviewing
Fix and improve this skill with Tessl
tessl review fix ./packages/decepticon/decepticon/skills/standard/recon/web-recon/subdomain-takeover/SKILL.mdSecurity
1 critical severity finding. Installing this skill is not recommended: please review these findings carefully if you do intend to do so.
E006: Malicious code pattern detected in skill scripts.
What this means
Detected high-risk code patterns in the skill content — including its prompts, tool definitions, and resources — such as data exfiltration, backdoors, remote code execution, credential theft, system compromise, supply chain attacks, and obfuscation techniques.
Why it was flagged
This document is explicit offensive guidance for performing subdomain takeover (recon, detection, and claiming PoC) and describes how to leverage takeovers for cookie theft, OAuth/SAML exfiltration, and other attacks, so it poses a high risk of deliberate misuse.
Low
Low-risk findings.
1 low severity finding. Worth noting, but not necessarily harmful.
W011: Third-party content exposure detected (indirect prompt injection risk).
What this means
The skill exposes the agent to untrusted, user-generated content from public third-party sources, creating a risk of indirect prompt injection. This includes browsing arbitrary URLs, reading social media posts or forum comments, and analyzing content from unknown websites.
Why it was flagged
SKILL.md’s REQUIRED workflow uses runtime web/DNS probing (e.g., `curl` to `https://crt.sh/...` and `curl` to attacker-controlled subdomains’ HTTP responses), which ingests outsider-authored free text from public websites and remote servers into the LLM’s context.
- Repository
- PurpleAILAB/Decepticon
- Commit
31e1c8e
- Audited
- Security analysis
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