CVE-2026-4081: ZeM STL (WordPress plugin) · Cross-site Scripting
Affects ZeM STL (WordPress plugin)Source CVE Database V5
Not known to be exploited · CVSS 6.4 Medium.
Data as of 30 Oct 2026, 11:52 UTC
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 15% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 2 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| jhdscriptZeM STL | Affected
| Fixed in– |
AI-suggested
Until an official fix is available, restrict Contributor-level access to trusted users only and consider disabling or removing the ZeM STL plugin if possible. Monitor for updates from the vendor regarding patches or official mitigations.
Description
The ZeM STL plugin for WordPress contains a stored cross-site scripting (XSS) vulnerability in all versions up to and including 1.0. This vulnerability arises from insufficient sanitization and escaping of user-supplied shortcode attributes 'url', 'color', and 'bgcolor'. Authenticated users with Contributor-level access or higher can exploit this to inject malicious scripts that execute when other users view the affected pages. The vulnerability has a medium severity with a CVSS score of 6.4.
References
- wordfence.com/threat-intel/vulnerabilities/id/07e415f9-42f1-4c80-a023-38f460f634d3?source=cve (opens in a new tab)
- plugins.trac.wordpress.org/browser/zem-stl-viewer/trunk/zemstl.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/zem-stl-viewer/tags/1.0/zemstl.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/zem-stl-viewer/trunk/zemstl.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/zem-stl-viewer/tags/1.0/zemstl.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/zem-stl-viewer/trunk/zemstl.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/zem-stl-viewer/tags/1.0/zemstl.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/zem-stl-viewer/trunk/zemstl.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/zem-stl-viewer/tags/1.0/zemstl.php (opens in a new tab)