What the vulnerability does
01Description
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.
Explanation of Vulnerability in Simple Terms
02Summary
The Events Calendar Countdown Addon for WordPress contains a stored cross-site scripting (XSS) vulnerability in versions up to 1.4.9. An authenticated user with low privileges can inject malicious scripts that execute in other users' browsers when they view affected pages. The vulnerability requires user interaction and can affect the site's integrity and confidentiality.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that run in other users' browsers, potentially stealing data or performing actions on their behalf.
Potential impact on your site
04Site Impact
Authenticated users can inject scripts affecting other visitors; site data and user sessions at risk if exploited.
Conditions required to exploit
05Prerequisites
Attacker must have a low-privilege WordPress account and trick a user into viewing a page containing the malicious payload.
Key dates
06Disclosure timeline
June 6, 2025
CVE published
April 28, 2026
Record updated