CVE-2021-24152: Sygnoos Popup Builder

Medium severity, CVSS 6.1. EPSS: 0.7% chance of exploitation in the next 30 days.

The "All Subscribers" setting page of Popup Builder was vulnerable to reflected Cross-Site Scripting.

Affected products

• Sygnoos Popup Builder: before 3.74 (fixed in 3.74)

Published 2021-04-05. Last modified 2026-06-17.