CVE-2021-36563

EIP tracks 1 public exploit for CVE-2021-36563. PoCs published by Edgarloyola.

AI-analyzed exploit summary This repository provides a detailed technical analysis of CVE-2021-36563, a stored and reflected XSS vulnerability in CheckMK Management Web Console versions 1.5.0 to 2.0.0p9. It includes a timeline of vulnerability discovery, vendor communication, and patching, along with references to official advisories and PoC demonstration videos.

The CheckMK management web console (versions 1.5.0 to 2.0.0) does not sanitise user input in various parameters of the WATO module. This allows an attacker to open a backdoor on the device with HTML content and interpreted by the browser (such as JavaScript or other client-side scripts), the XSS payload will be triggered when the user accesses some specific sections of the application. In the same sense a very dangerous potential way would be when an attacker who has the monitor role (not administrator) manages to get a stored XSS to steal the secretAutomation (for the use of the API in administrator mode) and thus be able to create another administrator user who has high privileges on the CheckMK monitoring web console. Another way is that persistent XSS allows an attacker to modify the displayed content or change the victim's information. Successful exploitation requires access to the web management interface, either with valid credentials or with a hijacked session.