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file-upload

Arbitrary file upload exploitation — webshell upload, extension bypass, content-type manipulation, and upload-to-RCE techniques.

68

Quality

82%

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SKILL.md
Quality
Evals
Security

Quality

Content

90%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 concise, highly actionable, and well-structured, with a verification loop in the core workflow; the main gap is inconsistent validation across the bypass-technique reference sections.

Suggestions

Add an explicit post-upload validation/check step to each bypass section (e.g., confirm the shell responds with a 200 and command output) rather than only in the PHP webshell section.

Consider a short 'Success criteria' or checklist summarizing how to confirm RCE was achieved across techniques.

DimensionReasoningScore

Conciseness

Lean and command-driven with almost no explanatory padding; a single-line intro plus executable snippets, assuming Claude's competence throughout.

5 / 5

Actionability

Fully executable, copy-paste-ready curl commands covering the common cases (PHP webshell, extension/content-type bypass, .htaccess, Python/Node) with concrete payload construction.

5 / 5

Workflow Clarity

Clear discover→upload→verify-find→execute sequence with a verification checkpoint (the 200-status loop) in the main PHP workflow, though several technique-reference sections lack explicit success validation.

4 / 5

Progressive Disclosure

Well organized into clearly labeled sections (Discovery, PHP Webshell, Extension Bypass, Content-Type, .htaccess, Python/Node, Post-Upload) with no nested references, though the single-file command catalog could arguably be split for very large extensions.

4 / 5

Total

18

/

20

Passed

Description

75%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 specific and distinct, clearly conveying what the skill does, but it omits an explicit 'when to use' trigger clause, which caps completeness at 3.

Suggestions

Add an explicit 'Use when...' clause (e.g., 'Use when testing file upload features, webshell deployment, or upload-to-RCE chains') to lift completeness above 3.

Include a couple of natural user phrasings or synonyms (e.g., 'image upload bypass', 'shell upload') directly in the description to improve trigger-term quality.

DimensionReasoningScore

Specificity

Lists multiple specific concrete techniques — 'webshell upload, extension bypass, content-type manipulation, and upload-to-RCE techniques' — giving comprehensive coverage of the skill's actions.

5 / 5

Completeness

Has a clear 'what' (lists the exploitation techniques) but lacks any 'Use when...' or equivalent explicit trigger clause in the description, which caps completeness at 3 per the judging guidelines.

3 / 5

Trigger Term Quality

Good keyword coverage within the description ('webshell upload', 'extension bypass', 'content-type manipulation'), though a few natural user phrasings are missing; not quite the comprehensive synonym set of the 5 anchor.

4 / 5

Distinctiveness Conflict Risk

Targets a clear niche — arbitrary file upload exploitation to RCE — with distinct, specific triggers and minimal overlap risk with unrelated skills.

5 / 5

Total

17

/

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

metadata_version

'metadata.version' is missing

Warning

Total

15

/

16

Passed

Repository
PurpleAILAB/Decepticon
Reviewed

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