CVE-2020-35217

EIP tracks 2 public exploits for CVE-2020-35217. PoCs published by dawetmaster, andikahilmy.

AI-analyzed exploit summary This repository contains a vulnerable version of Vert.x Web with FreeMarker template engine, demonstrating CVE-2020-35217. The code includes the vulnerable FreeMarkerTemplateEngine implementation, which allows for template injection attacks.

Vert.x-Web framework v4.0 milestone 1-4 does not perform a correct CSRF verification. Instead of comparing the CSRF token in the request with the CSRF token in the cookie, it compares the CSRF token in the cookie against a CSRF token that is stored in the session. An attacker does not even need to provide a CSRF token in the request because the framework does not consider it. The cookies are automatically sent by the browser and the verification will always succeed, leading to a successful CSRF attack.