PT-2026-45708 · Jhdscript · Zem Stl

Published 2026-06-02 · Updated 2026-06-02 · CVE-2026-4081

NVD

CVSS v3.1

6.4

Medium

Base vector

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

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.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-4081

Affected Products

Zem Stl

References · 10

• https://nvd.nist.gov/vuln/detail/CVE-2026-4081 · Security Note
• https://plugins.trac.wordpress.org/browser/zem-stl-viewer/tags/1.0/zemstl.php#L74 · Note
• https://plugins.trac.wordpress.org/browser/zem-stl-viewer/tags/1.0/zemstl.php#L103 · Note
• https://wordfence.com/threat-intel/vulnerabilities/id/07e415f9-42f1-4c80-a023-38f460f634d3?source=cve · Note
• https://plugins.trac.wordpress.org/browser/zem-stl-viewer/trunk/zemstl.php#L74 · Note
• https://plugins.trac.wordpress.org/browser/zem-stl-viewer/tags/1.0/zemstl.php#L107 · Note
• https://plugins.trac.wordpress.org/browser/zem-stl-viewer/trunk/zemstl.php#L104 · Note
• https://plugins.trac.wordpress.org/browser/zem-stl-viewer/tags/1.0/zemstl.php#L104 · Note
• https://plugins.trac.wordpress.org/browser/zem-stl-viewer/trunk/zemstl.php#L107 · Note
• https://plugins.trac.wordpress.org/browser/zem-stl-viewer/trunk/zemstl.php#L103 · Note