CVE Catalog

CVE-2026-16495

MediumCVSS 6.4
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.21%

10th percentile - higher than 10% of all known CVEs

Summary

The Countdown Timer – Widget Countdown plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'redirect_url' shortcode attribute in all versions up to and including 3.0.1 due to insufficient input sanitization and output escaping. This allows authenticated attackers with contributor-level access or higher to inject arbitrary web scripts into pages that execute whenever a user visits the injected page.

Risk Assessment

An attacker with a contributor account can persistently inject malicious JavaScript into site pages, potentially leading to session theft, redirects, or administrator account takeover. Any WordPress site running the vulnerable plugin version is at risk.

Recommendation

Update the Countdown Timer – Widget Countdown plugin to a version newer than 3.0.1 as soon as it becomes available. Until then, limit the number of users with contributor-level access and consider disabling the plugin.

Related vulnerabilities

Original NVD description (English source)

The Countdown Timer – Widget Countdown plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'redirect_url' Shortcode Attribute in all versions up to, and including, 3.0.1 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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS