CVE-2026-39666
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk6th percentile - higher than 6% of all known CVEs
Summary
A DOM-based Cross-site Scripting vulnerability in the Hello Bar Popup Builder plugin allows injection of malicious client-side scripts. The issue affects versions up to and including 1.5.1.
Risk Assessment
An attacker could execute arbitrary scripts in the victim's browser, potentially leading to session theft, redirects, or data theft.
Recommendation
Update the Hello Bar Popup Builder plugin to the latest version that includes input sanitization fixes.
Related vulnerabilities
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Original NVD description (English source)
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in telepathy Hello Bar Popup Builder hellobar allows DOM-Based XSS.This issue affects Hello Bar Popup Builder: from n/a through <= 1.5.1.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS