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A policy bypass vulnerability existed in the Content Security Policy (CSP) implementation in Google Chrome prior to version 84.0.4147.89. A remote attacker could craft a malicious HTML page that would bypass the intended CSP restrictions, potentially allowing the execution of unauthorized scripts or loading of restricted resources.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (1 hidden).
This repository provides a proof-of-concept (POC) exploit for CVE-2020-6519, a vulnerability in Chromium-based browsers (Chrome, Opera, Edge) that allows a full bypass of Content Security Policy (CSP) restrictions. The main exploit is implemented in 'CVE-2020-6519-TEST-IT-YOURSELF.js', which uses JavaScript to inject an iframe with a 'javascript:' URL, enabling the loading of external scripts, objects, and iframes from a forbidden domain (malicious.com) despite restrictive CSP rules. The POC directory contains HTML files with different CSP configurations and JavaScript files that demonstrate both failed and successful bypass attempts. The exploit can be used to steal cookies or execute arbitrary scripts from a remote attacker-controlled domain. The repository is structured with clear separation between demonstration files, exploit code, and documentation, making it easy to reproduce and understand the vulnerability's impact.
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