Thirty Bees Core v1.4.0 was discovered to contain a reflected cross-site scripting (XSS) vulnerability via the backup_pagination parameter at /controller/AdminController.php. This vulnerability allows attackers to execute arbitrary JavaScript in the web browser of a user via a crafted payload.
https://zigrin.com/advisories/thirty-bees-reflected-cross-site-scripting-xss/
https://github.com/thirtybees/thirtybees/commit/2c99464376ad7b3c95f220163a2411e35274c3ba