# BlackFan/client-side-prototype-pollution

Prototype Pollution and useful Script Gadgets

Repository: https://github.com/BlackFan/client-side-prototype-pollution
Canonical: https://ross.abutalabs.com/products/client-side-prototype-pollution
License Family: other
Last push: 2024-01-27T12:22:39+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 2164, "days_push": 949, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1644, forks 223 (observed 2026-08-28T04:05:16.050990+00:00)

## What it is
A curated collection of JavaScript libraries vulnerable to client-side prototype pollution via document.location parsing, along with useful script gadgets for demonstrating impact. It catalogs payloads, CVEs, and references for security researchers studying this class of web vulnerability.

## Use cases
- find libraries vulnerable to client-side prototype pollution
- learn how prototype pollution attacks work in the browser
- demonstrate impact of prototype pollution with script gadgets
- look up CVE payloads for query-string parsing vulnerabilities
- research client-side XSS via prototype pollution
- audit whether a frontend library is on the vulnerable list

## When to choose
- you are a security researcher or pentester studying prototype pollution
- you need real-world examples and payloads for a vulnerability report
- you are checking if a query-parsing library has a known pollution CVE

## When to avoid
- you need a tool that automatically scans or fixes prototype pollution
- you want a maintained library to include in production code
- you need server-side (Node.js) prototype pollution coverage specifically

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: security, penetration-testing, vulnerability-scanning, developer-tools
- domain: security, web-development, penetration-testing, tutorials
- platform: browser, cross-platform
- tags: prototype-pollution, xss, script-gadgets, client-side-security, cve-research, vulnerability-examples, security-research, web-server

## Member repositories
- BlackFan/client-side-prototype-pollution (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:16.050990+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:45:47.540216+00:00, confidence not recorded.
  - readme: https://github.com/BlackFan/client-side-prototype-pollution (fetched 2026-08-28T04:05:16.050990+00:00, sha ea3ad5ac2886)
- Data as of 2026-08-30T08:39:29.467469+00:00.