CVE Catalog

CVE-2026-4081

MediumCVSS 6.4
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.24%

15th percentile - higher than 15% of all known CVEs

Summary

The ZeM STL plugin for WordPress up to version 1.0 has a Stored XSS vulnerability via the [zemstl] shortcode. The 'url', 'color', and 'bgcolor' attributes are not properly sanitized, allowing authenticated users (Contributor+) to inject scripts.

Risk Assessment

An attacker can inject malicious scripts that execute on every visit to the infected page, potentially leading to session theft or redirects.

Recommendation

Update the ZeM STL plugin to the latest version. Temporarily remove the [zemstl] shortcode from content if possible.

Related vulnerabilities

Original NVD description (English source)

The ZeM STL plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the [zemstl] shortcode in all versions up to and including 1.0. This is due to insufficient input sanitization and output escaping on user-supplied shortcode attributes, specifically the 'url', 'color', and 'bgcolor' parameters. These attribute values are directly interpolated into HTML attribute context without being passed through esc_attr() or any other escaping function. 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