CVE-2025-49311 MEDIUM

CVE-2025-49311: WordPress The Events Calendar Countdown Addon plugin <= 1.4.9 - Cross Site Scripting (XSS) Vulnerability

Vendor Coolhappy
Product The Events Calendar Countdown Addon
Weakness CWE-79 · XSS
Published June 6, 2025
Last update April 28, 2026

CVSS base score

6.5/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L

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