client-path-traversal

client-path-traversal is a skill for Claude Code from mohdhaji87/payloadsallthethings-skills. It costs 24 tokens per session (1,665 once invoked), scanned A, original, no licence file.

A security test for changing a file path through browser-based code so it reaches files outside the intended location.

In plain words
What is it for?
Checking browser file-access features for unsafe path handling.
Why use it?
It helps find cases where client-side input can make a browser access the wrong file or resource.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the payloadsallthethings plugin — 61 skills shipped together

Good fit Checking browser file-access features for unsafe path handling.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/mohdhaji87/payloadsallthethings-skills/client-path-traversal
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 mohdhaji87/payloadsallthethings-skills --skill client-path-traversal
Clone the repo
git clone --depth 1 https://github.com/mohdhaji87/payloadsallthethings-skills

Made for: Claude Code.

Or install payloadsallthethings, the plugin that ships this one along with the rest of its 61 skills.

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 client-path-traversal

README.md
[![agentmods](https://agentmods.dev/badge/skills/mohdhaji87/payloadsallthethings-skills/client-path-traversal/github.svg)](https://agentmods.dev/skills/mohdhaji87/payloadsallthethings-skills/client-path-traversal)
Your own site
<a href="https://agentmods.dev/skills/mohdhaji87/payloadsallthethings-skills/client-path-traversal"><img src="https://agentmods.dev/badge/skills/mohdhaji87/payloadsallthethings-skills/client-path-traversal/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for client-path-traversal

Your own site · 80×15
<a href="https://agentmods.dev/skills/mohdhaji87/payloadsallthethings-skills/client-path-traversal"><img src="https://agentmods.dev/badge/skills/mohdhaji87/payloadsallthethings-skills/client-path-traversal.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 24 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,665 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 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 $0.00024 $0.01665
Opus 5 $0.00012 $0.00833
Sonnet 5 $0.00005 $0.00333
Haiku 4.5 $0.00002 $0.00167

Measured 11d ago against content hash 0ba72d7cf88a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

client-path-traversal scanned grade A 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 11d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

fetch(baseUrl + userInput)
payloadsallthethings/skills/client-path-traversal/SKILL.md · 292 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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. 11d ago First seen · 292 lines · 24 tokens per session scan A 0ba72d7cf88a

Subscribe to this mod's changes

client-path-traversal is a skill published in the GitHub repository mohdhaji87/payloadsallthethings-skills (21 stars, last pushed 8mo ago), with no licence file. It adds 24 tokens to every session and 1,665 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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