This vulnerability involves a cross-site scripting flaw in the SourceCodester Pharmacy Sales and Inventory System 1.0. Specifically, the vulnerability is triggered by manipulating the ID parameter in the /index.php?page=categories endpoint, allowing injection of malicious scripts. The attack vector is network-based with no privileges required, but user interaction is necessary to trigger the exploit. The CVSS 4.0 base score is 5.3, indicating medium severity. No official fix or patch has been published, and the product is not a cloud service, so remediation depends on vendor or user action.

Successful exploitation of this vulnerability allows an attacker to execute arbitrary scripts in the context of the affected web application for users who interact with the manipulated ID parameter. This can lead to session hijacking, defacement, or other client-side attacks. The impact is limited to the confidentiality and integrity of user interactions with the affected page. There is no indication of privilege escalation or server-side compromise from the available data.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch is currently available, users should consider applying input validation or output encoding on the ID parameter to mitigate the risk. Additionally, restricting user input and employing web application firewalls may help reduce exposure until an official fix is released.