Reflected Cross-Site Scripting (XSS) in Gym Management Software IsMyGym by Zuinq Studio affecting the reservation endpoint where the 'ret' parameter is reflected in the HTTP response without any proper sanitization. Successfull explotation of this vulnerability could allow an attacker to inject arbitrary JavaScript code executed in the context of the victim’s browser.

Reflected Cross-Site Scripting (XSS) vulnerability in IsMyGym by Zuinq Studio. This vulnerability allows an attacker to execute JavaScript code in the victim's browser by sending them a malicious URL with '/<PATH>.php/<XSS>'. This vulnerability can be exploited to steal sensitive user data, such as session cookies, or to perform actions on behalf of the user.