A vulnerability has been found in SourceCodester Design and Implementation of Covid-19 Directory on Vaccination System 1.0 and classified as problematic. Affected by this vulnerability is an unknown functionality of the file register.php. The manipulation of the argument txtfullname/txtage/txtaddress/txtphone leads to cross site scripting. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-222853 was assigned to this vulnerability.