# maxchehab/CSS-Keylogging

Chrome extension and Express server that exploits keylogging abilities of CSS.

Repository: https://github.com/maxchehab/CSS-Keylogging
Canonical: https://ross.abutalabs.com/products/css-keylogging
Language: CSS
License Family: other
Last push: 2018-02-20T23:49:04+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 3116, "days_push": 3116, "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 3240, forks 424 (observed 2026-08-28T04:07:50.480562+00:00)

## What it is
A proof-of-concept Chrome extension and Express server demonstrating a CSS-based keylogging attack using attribute selectors and background-image requests. It captures keystrokes typed into password fields on sites using controlled component frameworks like React.

## Use cases
- demonstrate css attribute selector keylogging attack
- test whether a website is vulnerable to css keylogging
- learn about css-based exfiltration techniques
- security research on browser side-channel attacks
- educate developers about password field vulnerabilities

## When to choose
- you need a working demo of CSS-based keystroke exfiltration for security education
- you are researching browser-side data exfiltration attacks
- you want to test defensive measures against CSS attribute selector attacks

## When to avoid
- you need a production-ready or maintained tool - the project is from 2018 with no license
- you want a general-purpose keylogger rather than a security demonstration
- your target site does not use controlled component frameworks like React

## Facets
- artifact type: plugin
- maturity: abandoned
- function: security, browser-extension, http-server
- domain: security, browser-extensions, web-development
- platform: browser
- tags: keylogger, css-attack, proof-of-concept, attribute-selectors, express, nodejs

## Member repositories
- maxchehab/CSS-Keylogging (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:50.480562+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 2026-08-30T07:24:32.023422+00:00, confidence not recorded.
  - readme: https://github.com/maxchehab/CSS-Keylogging (fetched 2026-08-28T04:07:50.480562+00:00, sha 6e8337f4c3d1)
- Data as of 2026-08-30T08:39:29.467469+00:00.