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Hunt client-side DOM vulnerabilities — DOM Clobbering (overwrite JS globals via HTML injection), PostMessage hijacking (missing origin check), Service Worker abuse (intercept requests from same-origin script), CSS Injection/Exfiltration (attribute selectors → token char-by-char via OOB), client-side template injection, dangerouslySetInnerHTML. Grounded in named public research: Gareth Heyes / PortSwigger DOM-clobbering + DOM-Invader, Michał Bentkowski DOMPurify clobbering bypasses, jQuery htmlPrefilter XSS (CVE-2020-11022 / CVE-2020-11023), d0nut CSS-exfil research. Use when hunting DOM-XSS, client-side auth bypass, or token exfiltration without server-side interaction.

Install

npx skills add elementalsouls/Claude-BugHunter --skill hunt-dom -a claude-code

Installs to .claude/skills/hunt-dom/ · Each command fetches the skill straight from GitHub with the open skills CLI.

No download: this skill’s licence (MIT) does not let us redistribute its files. The install commands fetch them from GitHub instead.

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Why 83

Security80
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Maintenance100
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Adoption59

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