Stored Cross-Site Scripting Vulnerability in Countdown Timer Plugin for WordPress
CVE-2026-16495

6.4MEDIUM

Key Information:

Vendor

WordPress
Status
Countdown Timer – Widget Countdown
Vendor
CVE Published:
14 October 2026

What is CVE-2026-16495?

The Countdown Timer – Widget Countdown plugin for WordPress is susceptible to a Stored Cross-Site Scripting attack. This vulnerability arises from poor input sanitization and lack of adequate output escaping in the 'redirect_url' shortcode attribute. Authenticated users with contributor-level access or higher can exploit this flaw to inject malicious scripts into web pages. These scripts will execute each time the compromised page is accessed, potentially compromising user data and system integrity.

Affected Version(s)

Countdown Timer – Widget Countdown 3.0.0 <= 3.0.1

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/widget-countdo...

CVSS V3.1

Score:
6.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Yuto Hyakumoto
.