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hunt-exceptional-conditions

Hunt mishandling of exceptional conditions — feed an endpoint malformed/unexpected input (wrong type, broken JSON, oversized field, null byte) and make it fail OPEN or leak internals: a verbose stack-trace / framework error page that discloses ORM internals, server file paths, library versions, or a language traceback. Use on any input-accepting endpoint (JSON APIs, forms, query params). Medium-High when the leak exposes internal structure that arms a deeper attack.

76

Quality

96%

Does it follow best practices?

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SecuritybySnyk

Critical

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SKILL.md
Quality
Evals
Security

Quality

Content

93%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

The body is a tight, actionable playbook: concrete payloads, framework-specific leak signatures, and a clear recon-to-validation sequence with no padding. The only minor gap is the absence of an explicit retry/feedback loop in the validation section.

Suggestions

Add a brief validate->retry feedback loop in 'Validation discipline' (e.g., 'if the response is a clean generic error, vary the payload/parameter and re-test') to push workflow clarity to 5.

Consider one line noting how to escalate a confirmed leak into a chained finding (it references hunt-sqli/hunt-lfi but could state the handoff step explicitly).

DimensionReasoningScore

Conciseness

Lean and efficient; assumes Claude's competence without explaining what a stack trace or ORM is, and every line earns its place — recon targets, attack payloads, and leak signatures are delivered directly.

5 / 5

Actionability

Provides fully copy-paste-ready payloads ('{"rating":"notanumber","comment":[1,2,3]}', '/item/%00') and specific per-framework leak signatures (SequelizeDatabaseError, 'Traceback (most recent call last)', 'Server Error in / Application) covering the common cases.

5 / 5

Workflow Clarity

Clear sequence (Recon -> Attack -> what counts as a leak -> Validation discipline) with an evidence-capture checkpoint, but it stops short of an explicit validate->fix->retry feedback loop; still well above the anchor for a 4.

4 / 5

Progressive Disclosure

A single self-contained file well under 50 lines with clear section headers and no external references needed; per the simple-skills note this scores 5 with just well-organized sections.

5 / 5

Total

19

/

20

Passed

Description

100%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

The description is concrete, trigger-rich, and explicitly states both what the skill does and when to use it, all in third person. It is comprehensive without padding and clearly distinguishable from related hunting skills.

DimensionReasoningScore

Specificity

Lists multiple concrete actions — feed malformed/unexpected input (wrong type, broken JSON, oversized field, null byte) and detect fail-open or verbose stack-trace/ORM/path/version leaks — covering the attack surface comprehensively.

5 / 5

Completeness

Explicitly answers both what (hunt mishandling of exceptional conditions, leak internals via malformed input) and when ('Use on any input-accepting endpoint (JSON APIs, forms, query params)') with concrete trigger phrases.

5 / 5

Trigger Term Quality

Includes natural terms a user would say — 'broken JSON', 'oversized field', 'null byte', 'verbose stack-trace', 'JSON APIs, forms, query params' — plus synonyms and concrete payload types.

5 / 5

Distinctiveness Conflict Risk

Occupies a clear niche (exceptional-condition mishandling / verbose-error / fail-open disclosure) with distinct triggers and payload types, minimal overlap risk with adjacent skills like hunt-sqli or hunt-lfi.

5 / 5

Total

20

/

20

Passed

Validation

93%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation15 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

frontmatter_unknown_keys

Unknown frontmatter key(s) found; consider removing or moving to metadata

Warning

Total

15

/

16

Passed

Repository
elementalsouls/Claude-BugHunter
Reviewed

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