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6.5

Hello Bar Popup Builder: Malicious Code Injected into Web Pages

CVE-2026-39666 · published 7 months ago
Summary

A security issue in Hello Bar Popup Builder allows attackers to inject malicious code into web pages, potentially stealing user data or taking control of a website. This affects versions up to 1.5.1. Update to the latest version to fix the issue.

Original advisory text
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 Po...
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.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
6.5 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-79Cross-site Scripting (XSS)
Timeline
Published8 Apr 2026
Updated26 Oct 2026
First seen8 Apr 2026
Sources
CVE-2026-39666 · NVD
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