agentmods.dev

hunt-upload

hunt-upload is a skill for Claude Code, Codex from Encod3d-Sec/TORCH. It costs 48 tokens per session (1,226 once invoked), scanned A, original, MIT.

A guided method for testing file-upload features for security flaws, such as bypassing file checks, unsafe filenames, script injection, archive extraction bugs, and denial-of-service risks.

In plain words
What is it for?
It is for assessing profile images, document imports, attachments, image processors, SVG/PDF handling, and firmware or plugin uploads.
Why use it?
It helps reveal when uploaded files are trusted or processed unsafely, without treating every upload location as equally risky or claiming a vulnerability from an error alone.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

not rated 303 +2 5d ago A scan 48 tokens original MIT
View the source file Encod3d-Sec/TORCH
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.

agentmods
npx agentmods add skills/encod3d-sec/torch/hunt-upload
Any agent
npx skills add Encod3d-Sec/TORCH --skill hunt-upload
Clone the repo
git clone --depth 1 https://github.com/Encod3d-Sec/TORCH

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 hunt-upload

README.md
[![agentmods](https://agentmods.dev/badge/skills/encod3d-sec/torch/hunt-upload.svg)](https://agentmods.dev/skills/encod3d-sec/torch/hunt-upload)
Your own site
<a href="https://agentmods.dev/skills/encod3d-sec/torch/hunt-upload"><img src="https://agentmods.dev/badge/skills/encod3d-sec/torch/hunt-upload.svg" alt="Measured on agentmods" height="20"></a>
Per session 48 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,226 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original 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 $0.00048 $0.01226
Opus 5 $0.00024 $0.00613
Sonnet 5 $0.00010 $0.00245
Haiku 4.5 $0.00005 $0.00123

Measured 6d ago against content hash e2b763b6be8b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

hunt-upload scanned grade A with 0 findings 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 6d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/hunt/hunt-upload/SKILL.md · 71 lines

How it starts

The opening of the file, as written. The whole thing — 71 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Hunt: File Upload

Assumes hunt-core for the scope gate, two-account rule, confirmation gate, enumeration limits, stop conditions, wiki protocol, FIND output, and Deadends. Do not re-derive any of that here.

Wiki

qmd_query "file upload webshell extension content-type magic-byte bypass SVG XXE zip slip path traversal" via wiki-search MCP

Hub: [[web-moc]] (live index). Primary page: [[file-upload]]. Payload arsenal: wiki/payloads/file-upload.md. Anchors: [[path-traversal-lfi]].

Attack surface

Rank the sinks first - not every upload reaches code:

  • Avatar / profile / logo / signature fields - most common; frequently re-encoded, so check whether the original bytes are served back.
  • Document / CSV / XML import - parser sinks (XXE, formula injection, zip).
  • Ticket / message attachments - often served under the original name and type from a reachable path.
  • Image-processing (thumbnails -> ImageMagick/Ghostscript), SVG/PDF render, EXIF parsers - the processor is the bug, not the store.
  • Firmware / plugin / theme upload - direct code load; highest value when present.

Then attack in layers, cheapest first: extension -> content-type -> magic-byte -> parser/render.

Methodology

  1. Baseline: upload a valid file; note stored path, returned URL, filename transformation, and whether it is reachable + executed by the server.
  2. Extension bypass:
shell.php  shell.phtml  shell.php5  shell.phar  shell.pHp
shell.php.jpg   shell.jpg.php   shell.php%00.jpg   shell.php;.jpg
shell.php/   shell.php....   (trailing dot/space on Windows)
.htaccess  ->  AddType application/x-httpd-php .jpg   (then upload .jpg shell)
web.config (IIS)   .jsp/.jspx/.war (Java)   .asp/.aspx (IIS)
  1. Content-Type / magic-byte bypass: set Content-Type: image/png; prepend real magic bytes (GIF89a;, \xFF\xD8\xFF JPEG, %PDF-) before the payload; polyglot (valid image + PHP).
  2. Path traversal in filename: filename="../../../../var/www/html/shell.php" to escape the upload dir / overwrite files.
  3. SVG / XML: SVG with <script> -> stored XSS ([[xss]]); SVG/XML with external entity -> [[xxe]] (file read/SSRF).
  4. Archive: zip-slip (../ paths inside zip) on extract; symlink in archive -> read host files.
  5. Image processing: ImageMagick/Ghostscript (ImageTragick CVE-2016-3714), pixel-flood DoS, EXIF payload executed by a downstream parser.
  6. Confirm by execution, through Burp. Request the uploaded shell in Burp Repeater (operator visibility) and run a command (?cmd=id); OOB callback if blind. For traversal, fetch the written/read target back from the path you claimed it hit.
  7. Distill (confirmed, generic): per hunt-core, python3 scripts/wiki-stage.py --kind technique --slug <slug> --target-page techniques/web/file-upload.md.

Read the full file on GitHub · 71 lines

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. 6d ago First seen · 71 lines · 48 tokens per session scan A e2b763b6be8b

Subscribe to this mod's changes

hunt-upload is a skill published in the GitHub repository Encod3d-Sec/TORCH (303 stars, last pushed 5d ago), licensed MIT. It adds 48 tokens to every session and 1,226 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Security
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