KNOXSS focuses on finding reflected cross-site scripting vulnerabilities during web security testing. It is catalogued under Application security & vulnerability scanning on PulseGate.

KNOXSS is a B2B product built for penetration testers and web security researchers.

What platforms does KNOXSS run on?

KNOXSS runs on the web and embeddable surfaces.

Is KNOXSS still maintained?

Unverified. KNOXSS has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.

What projects are similar to KNOXSS?

Similar projects tracked by PulseGate include XSSpect, Check XSS, and XSSassin.

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KNOXSS

Name: KNOXSS
Author: Ku3933

mozilla.orgApplication security & vulnerability scanning

KNOXSS Community Edition is a free Firefox extension that checks GET and POST requests for common reflected cross-site scripting cases. It parses page source to identify reflected input and is intended for penetration testers and security researchers, with possible false positives and negatives.

FreeWebEmbeddable

Visit mozilla.org

Overview

6 features

KNOXSS sits in PulseGate's Application security & vulnerability scanning category. It focuses on finding reflected cross-site scripting vulnerabilities during web security testing. It is built as a B2B product for penetration testers and web security researchers. It is available for free. KNOXSS is available on the web and embeddable surfaces.

It is developed by Ku3933, and it first shipped in 2024. Among its 6 catalogued features are GET request testing, POST request testing, and source parsing. The interface is available in 32 languages, including Czech, German, and Greek. KNOXSS is currently in beta.

Summary written by a language model from the project’s public pages.

GET request testing
POST request testing
Source parsing
Browser toolbar access
Notifications
Tab access

Built with & integrations

Runs on

BrowserEmbeddable

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tierMulti-languageStore-verified publisher

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed16 Sep · 01:38 UTC
KNOXSS verified via Firefox Add-ons
Source: Firefox Add-ons · Open

Frequently asked questions about KNOXSS

What does KNOXSS do?: KNOXSS focuses on finding reflected cross-site scripting vulnerabilities during web security testing. It is catalogued under Application security & vulnerability scanning on PulseGate.
Who is KNOXSS for?: KNOXSS is a B2B product built for penetration testers and web security researchers.
Is KNOXSS free?: Yes — KNOXSS is free to use.
What platforms does KNOXSS run on?: KNOXSS runs on the web and embeddable surfaces.
Is KNOXSS still maintained?: Unverified. KNOXSS has not been re-checked since it entered the index, so there is no finding either way — and only a positive finding would say otherwise.
What projects are similar to KNOXSS?: Similar projects tracked by PulseGate include XSSpect, Check XSS, and XSSassin.XSSpect Check XSS XSSassin
Who develops KNOXSS?: KNOXSS is developed by Ku3933.
When did KNOXSS launch?: KNOXSS first shipped in 2024.

At a glance

Pricing: Free
Platforms: Web
Status: 🟡 Beta
Built for: penetration testers and web security researchers
Model: B2B
Solves: Finding reflected cross-site scripting vulnerabilities during web security testing.

Registered as

Firefox Add-ons: knoxss

Developer

Ku3933

Index record

Indexed: 16 Sep 2026
Lifecycle: Alive
Last seen: 16 Sep 2026

Identity audit (13)

Slug: knoxss-mozilla-org
Lifecycle state recorded: 16 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 16 Sep 2026
Timeline basis: Indexed-at chronology. This listing's first-seen date was written by the catalog backfill, not observed here, so it is not treated as a sighting.
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 16 Sep 2026
Canonical URL: https://addons.mozilla.org/en-US/firefox/addon/knoxss

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