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VulnerabilityPublished

CVE-2026-4081: ZeM STL (WordPress plugin) · Cross-site Scripting

Affects ZeM STL (WordPress plugin)Source CVE Database V5

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Not known to be exploited · CVSS 6.4 Medium.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
6.4Medium
How severe the flaw is on the 0–10 CVSS scale.
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:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 2 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
jhdscriptZeM STLAffected
  • <=1.0
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

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