CVE-2026-102398
Received Received - Intake

Unauthenticated XSS in Popup by Supsystic

Publication date: 2026-09-30

Last updated on: 2026-09-30

Assigner: Patchstack

Description
Unauthenticated Cross Site Scripting (XSS) in Popup by Supsystic <= 1.13.1 versions.

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Meta Information

Published
2026-09-30
Last Modified
2026-09-30
Generated
2026-09-30
AI Q&A
2026-09-30
EPSS Evaluated
N/A
NVD
CVE-2026-102398
EUVD
EUVD-2026-89945

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
supsystic popup to 1.13.1 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

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Executive Summary

This is an Unauthenticated Cross Site Scripting (XSS) vulnerability found in Popup by Supsystic versions 1.13.1 and below. It allows attackers to inject malicious scripts into web pages viewed by other users without needing authentication.

Detection Guidance

To detect this XSS vulnerability in Popup by Supsystic <= 1.13.1, inspect web application inputs for script tags or event handlers. Check for user-supplied data rendered without proper sanitization in versions up to 1.13.1.

Impact Analysis

An attacker could exploit this to steal user sessions, deface websites, or redirect users to malicious sites. Users with sensitive data on the site could have their information compromised.

Compliance Impact

This vulnerability could lead to unauthorized access to personal data, violating GDPR and HIPAA requirements for data protection and security. Organizations may face fines or legal consequences if exploited.

Mitigation Strategies

Immediately update Popup by Supsystic to the latest version beyond 1.13.1. If an update is unavailable, disable the plugin until a patch is released. Implement input validation and output encoding on all user-supplied data.

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