OpenCart 3.x, when the attacker has login access to the admin panel, allows stored XSS within the Source/HTML editing feature of the Categories, Product, and Information pages.
- http://packetstormsecurity.com/files/154286/Opencart-3.x-Cross-Site-Scripting.html
- https://github.com/nipunsomani/Opencart-3.x.x-Authenticated-Stored-XSS/blob/master/README.md
- https://github.com/nipunsomani/Opencart-3.x.x-Authenticated-Stored-XSS