Exceptional Conditions Hunter

Exceptional Conditions Hunter is a Quality skill for Claude Code, published by elementalsouls in Claude-BugHunter.

3.6K stars559 forkson elementalsouls/Claude-BugHunterAdded 2026/08/16+3% in starsRepository updated 2026/08/16

ai-securityanthropicapplication-securitybug-bountybugbountybugcrowdclaudeclaude-codeclaude-skillsethical-hackinghackeroneoffensive-securitypentestingred-teamsecurity-toolsweb-security

Install in seconds

Install Exceptional Conditions Hunter

Copy Exceptional Conditions Hunter into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/elementalsouls/Claude-BugHunter/tree/main/skills/hunt-exceptional-conditions ~/.claude/skills/hunt-exceptional-conditions

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/elementalsouls/Claude-BugHunter.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: skills/hunt-exceptional-conditions/SKILL.md in elementalsouls/Claude-BugHunter
Installs to: ~/.claude/skills/hunt-exceptional-conditions
Collection: One of 25 skills cataloged from this repository
Category: Quality — 1354 skills

What Exceptional Conditions Hunter does

Exceptional Conditions Hunter probes web endpoints with malformed or unexpected input to surface verbose error pages, stack traces, and internal file paths or library versions. Use it when testing APIs, forms, or query parameters for error-disclosure vulnerabilities.

Exceptional Conditions Hunter is cataloged under Quality on DirSkills. Exceptional Conditions Hunter comes from a repository tagged ai-security, anthropic, application-security, bug-bounty and bugbounty.

Documentation

README

Excerpt

HUNT-EXCEPTIONAL-CONDITIONS — Verbose Errors / Fail-Open (A10:2025)

What actually pays

Well-built apps catch errors and return a clean, generic message. A broken app, when handed input it didn't expect, throws an unhandled exception and renders a developer error page straight to the client — leaking the stack trace, the ORM/query internals, server-side file paths, and framework/library versions. That disclosure is the finding (and it arms SQLi/RCE/path attacks next).

Recon

Any endpoint that parses input is a candidate; the richest are:

JSON APIs that expect typed fields:  POST /api/* with {numbers, ids, enums}
Endpoints with numeric/id path or query params:  /item/{id}, ?page=, ?quantity=
Search / filter / sort params
File or content-type sensitive uploads

This is the opening of the README. Read the full README on GitHub.

Frequently asked about Exceptional Conditions Hunter

What else does elementalsouls publish alongside Exceptional Conditions Hunter?
Exceptional Conditions Hunter is one of 25 skills that DirSkills catalogs from elementalsouls/Claude-BugHunter, the repository it ships in. Its siblings there include API Misconfig Hunter, APK Red Team Pipeline and Auth Bypass Hunting. Each one is a separate skill with its own page in this directory, installs the same way Exceptional Conditions Hunter does, and is maintained by elementalsouls in that same repository. The rest of the collection is listed on the elementalsouls/Claude-BugHunter page.
How does Exceptional Conditions Hunter compare to other Quality skills?
Exceptional Conditions Hunter ranks #375 by stars among the 1354 Quality skills in this catalog. The most-starred ones next to it are Benchmark, Benchmark Optimization Loop and API Design Patterns. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Exceptional Conditions Hunter against them. Open each page to compare what they document and how they install.