A vulnerability has been found in SourceCodester Event Registration System 1.0 and classified as problematic. Affected by this vulnerability is an unknown functionality of the file /event/admin/?page=user/list. The manipulation of the argument First Name/Last Name leads to cross site scripting. The CWE definition for the vulnerability is CWE-79. The weakness was released 11/30/2022. It is possible to read the advisory at vuldb.com. This vulnerability is known as CVE-2022-4233. The attack can be launched remotely. Technical details are available. Furthermore, there is an exploit available. The pricing for an exploit might be around USD $0-$5k at the moment. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $0-$5k. A possible mitigation has been published even before and not after the disclosure of the vulnerability.