This vulnerability affects code-projects Simple Laundry System 1.0 and involves improper handling of the userid parameter in the /modmemberinfo.php file. An attacker can craft a malicious input to this parameter to execute cross-site scripting attacks. The CVSS 4.0 base score is 5.3, indicating medium severity, with network attack vector, low attack complexity, no privileges required, and user interaction needed. The vulnerability has been publicly disclosed but lacks an official fix or patch at this time.

Successful exploitation allows an attacker to execute arbitrary scripts in the context of the affected web application for users who interact with the malicious input. This can lead to session hijacking, defacement, or other client-side impacts. However, the vulnerability does not require privileges or authentication and has a medium severity rating. There are no reports of active exploitation in the wild.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider applying input validation or output encoding on the userid parameter to mitigate XSS risks. Monitoring for updates from the vendor is recommended.