Stored Cross-Site Scripting Vulnerability in Themify Popup for WordPress
CVE-2026-109989

6.4MEDIUM

Key Information:

Vendor

WordPress
Status
Themify Popup
Vendor
CVE Published:
17 October 2026

What is CVE-2026-109989?

The Themify Popup plugin for WordPress is susceptible to stored Cross-Site Scripting vulnerabilities due to inadequate input sanitization and output escaping in the 'popup_width_unit' parameter. This flaw allows authenticated attackers with author-level privileges to inject malicious web scripts, which can execute when users access compromised pages, posing a significant security threat to the affected WordPress sites.

Affected Version(s)

Themify Popup 0 <= 1.4.7

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/themify-popup/...
https://plugins.trac.wordpress.org/browser/themify-popup/...

CVSS V3.1

Score:
6.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Wordfence PRISM
.