An issue was discovered in BigTree 4.2.22. There is cross-site scripting (XSS) in /core/inc/lib/less.php/test/index.php because of a $_SERVER['REQUEST_URI'] echo, as demonstrated by the dir parameter in a file=charsets action.
- https://github.com/bigtreecms/BigTree-CMS/issues/333
No PoCs found on GitHub currently.