CVE-2025-49311: Coolhappy The Events Calendar Countdown Addon

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in CoolHappy The Events Calendar Countdown Addon countdown-for-the-events-calendar allows Stored XSS.This issue affects The Events Calendar Countdown Addon: from n/a through <= 1.4.9.

Affected products

• Coolhappy The Events Calendar Countdown Addon: up to and including 1.4.9

Published 2025-06-06. Last modified 2026-06-17.