CSP B Gone wót Hacks and Hops

Code
This addon is free and open-source software (FOSS) all code can be found here: https://github.com/ACK-J/CSP-B-Gone
Please report your bugs or feature requests in a GitHub issue instead of in a review.

Test if it works!
https://apple.com/

This addon checks the CSP of the current website against a list of known bypasses. You can also use the search bar to check if a specific domain has a known CSP bypass.

How Does a CSP Bypass Work?
The most common way to bypass CSP is by finding a JSONP endpoint on a trusted domain within the CSP. JSONP takes advantage of the fact that the same-origin policy does not prevent execution of external <script> tags. Usually, a <script src="some/js/file.js"> tag represents a static script file. But you can just as well create a dynamic API endpoint, say /userdata. jsonp, and have it behave as a script by accepting a query parameter (such as ?callback=CALLBACK).

JSONP endpoints used to bypass CSP are discovered by querying the archive.org database on a monthly basis for URLs with a common feature set. Each suspected URL is injected into a script src element inside a headless browser with the alert() function hooked. If an alert box fires then the URL is a confirmed JSONP endpoint and added to the GitHub list HERE.

When would I need a CSP Bypass?
A Content Security Policy (CSP) bypass may be necessary in specific scenarios, typically related to web security testing or development. CSP is a security feature that helps prevent a range of attacks like Cross-Site Scripting (XSS), data injection attacks, and clickjacking by controlling which resources the browser is allowed to load and execute.

Donations

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