CVE-2025-5929 MEDIUM

CVE-2025-5929: The Countdown <= 2.0.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via clientId Parameter

Vendor Zourbuth
Product The Countdown – Block Countdown Timer
Weakness CWE-79 · XSS
Published June 26, 2025
Last update April 8, 2026
View on NVD All CVEs

CVSS base score

6.4/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

The The Countdown plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘clientId’ parameter in all versions up to, and including, 2.0.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Key dates

02Disclosure timeline

June 26, 2025 CVE published
April 8, 2026 Record updated