upload-insecure-files

upload-insecure-files is a skill for Claude Code, Codex from jinyimeng01/net-code-audit-skill-master. It costs 0 tokens per session (4,626 once invoked), scanned B, original, MulanPSL-2.0.

A security-audit guide for unsafe file uploads, where a website accepts files that can create security or server-side risks.

In plain words
What is it for?
Use it to review upload endpoints, file validation, and how uploaded files are stored or processed.
Why use it?
It helps find upload handling that may allow dangerous files or insufficiently checked content into an application.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing.

Good fit Use it to review upload endpoints, file validation, and how uploaded files are stored or processed.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/jinyimeng01/net-code-audit-skill-master/upload-insecure-files
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add jinyimeng01/net-code-audit-skill-master --skill upload-insecure-files
Clone the repo
git clone --depth 1 https://github.com/jinyimeng01/net-code-audit-skill-master

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for upload-insecure-files

README.md
[![agentmods](https://agentmods.dev/badge/skills/jinyimeng01/net-code-audit-skill-master/upload-insecure-files.svg)](https://agentmods.dev/skills/jinyimeng01/net-code-audit-skill-master/upload-insecure-files)
Your own site
<a href="https://agentmods.dev/skills/jinyimeng01/net-code-audit-skill-master/upload-insecure-files"><img src="https://agentmods.dev/badge/skills/jinyimeng01/net-code-audit-skill-master/upload-insecure-files.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,626 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00000 $0.04626
Opus 5 $0.00000 $0.02313
Sonnet 5 $0.00000 $0.00925
Haiku 4.5 $0.00000 $0.00463

Measured 7d ago against content hash ba0194db98eb, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade B, and why

upload-insecure-files scanned grade B with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Cloud metadata endpointmediumServer-side request forgery

One request to 169.254.169.254 can return temporary IAM credentials.

http://169.254.169.254/latest/meta-data/iam/security-credentials/

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

net-skill/dotnet-offsec-audit/references/raw/hack-skills/upload-insecure-files/SKILL.md · 549 lines

The source is not reproduced here

Licensed MulanPSL-2.0

The repository is licensed MulanPSL-2.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 7d ago First seen · 549 lines · 0 tokens per session scan B ba0194db98eb

Subscribe to this mod's changes

upload-insecure-files is a skill published in the GitHub repository jinyimeng01/net-code-audit-skill-master (5 stars, last pushed 4mo ago), licensed MulanPSL-2.0. It costs nothing until one of its globs matches a file; then it loads 4,626 tokens. A static security scan graded it B with 1 finding (cloud metadata endpoint). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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