A vulnerability exists in the Create User process, allowing the creation of a new admin account with an option to upload a profile image. An attacker can upload a malicious SVG file containing an embedded script. When the profile image is accessed, the embedded script executes, leading to the potential theft of session cookies.
Details
Login as admin
Go to Create User
Fill up everything in the registration form then upload SVG image as a profile picture
In SVG image, add script tag to prepare for XSS attack
Complete the Create User process
Right click at the image to obtain image URL address
XSS triggered
PoC
The below link is a private YouTube video for PoC.
https://youtu.be/5j8owD0--1A
Impact
The stored XSS can lead to session hijacking and privilege escalation, effectively bypassing any CSRF protections in place.