---
id: CVE-2026-4316
title: Reflected Cross-Site Scripting in software IsMyGym by Zuinq Studio
summary: >-
  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
  explotati…
severity: medium
cvss: 5.1
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-79
vendor: Zuinq Studio
product: IsMyGym
affected:
  - IsMyGym versions prior to v6.0.85
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-26T13:32:56.589370Z'
published: '2026-10-26'
updated: '2026-10-26'
sourceUpdated: '2026-10-26T14:35:18.557Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-4316'
references:
  - url: >-
      https://www.incibe.es/en/incibe-cert/notices/aviso/reflected-cross-site-scripting-software-ismygym-zuinq-studio
tags:
  - cve.org
epss: 0.00418
epssPercentile: 0.3584
ingestedAt: '2026-10-26T10:23:42.837Z'
---

## Overview

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.

## Affected

- `IsMyGym versions prior to v6.0.85`

## Remediation

The vulnerability has been fixed by Zuinq Studio team in version v6.0.85.