CVE-2026-4081
Description
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.
Affected products
2- Range: <=1.0
Patches
0No patches discovered yet.
Vulnerability mechanics
No source-code context for this CVE — mechanics is only generated when we can read the actual fix diff. Without that, the four sections (root cause, attack vector, affected code, fix) would be speculation rather than analysis.
References
9- plugins.trac.wordpress.org/browser/zem-stl-viewer/tags/1.0/zemstl.phpnvd
- plugins.trac.wordpress.org/browser/zem-stl-viewer/tags/1.0/zemstl.phpnvd
- plugins.trac.wordpress.org/browser/zem-stl-viewer/tags/1.0/zemstl.phpnvd
- plugins.trac.wordpress.org/browser/zem-stl-viewer/tags/1.0/zemstl.phpnvd
- plugins.trac.wordpress.org/browser/zem-stl-viewer/trunk/zemstl.phpnvd
- plugins.trac.wordpress.org/browser/zem-stl-viewer/trunk/zemstl.phpnvd
- plugins.trac.wordpress.org/browser/zem-stl-viewer/trunk/zemstl.phpnvd
- plugins.trac.wordpress.org/browser/zem-stl-viewer/trunk/zemstl.phpnvd
- www.wordfence.com/threat-intel/vulnerabilities/id/07e415f9-42f1-4c80-a023-38f460f634d3nvd
News mentions
1- WordPress: 25 Vulnerabilities Disclosed Together on June 2, 2026Vypr Intelligence · Jun 2, 2026