Medium · CVSS 5.1CVE-2026-4316

Reflected Cross-Site Scripting in software IsMyGym by Zuinq StudioCVE-2026-4316

Answer in brief

CVE-2026-4316 records a Medium severity (CVSS 5.1) vulnerability in Reflected Cross-Site Scripting in software IsMyGym by Zuinq Studio. The current sources do not mark it as known exploited. The current feed maps Zuinq Studio/IsMyGym (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 26, 2026Updated Oct 26, 2026Source checked Oct 26, 2026First seen by HOL Oct 26, 2026Material review Oct 26, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.1
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 5.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Zuinq Studio/IsMyGym (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Zuinq Studio/IsMyGymgeneric	versions prior to v6.0.85	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Zuinq Studio/IsMyGym.
Review the reported fix. Source-reported solution: The vulnerability has been fixed by Zuinq Studio team in version v6.0.85.

Evidence timeline and material changes

Published upstream
Oct 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 26, 2026

Sources and claim methodology

Source referenceincibe.es

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.