Medium severity · published Oct 17, 2026
CVE-2026-109989
Themify Popup <= 1.4.7 - Authenticated (Author+) Stored Cross-Site Scripting via 'popup_width_unit' Parameter
6.4
CVSS
0.2%
EPSS
No
On KEV
Description
The Themify Popup plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'popup_width_unit' parameter in all versions up to, and including, 1.4.7 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TP
Themify Popup · themifyme
through 1.4.7 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-109989
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-109989
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/themify-popup/tags/1.4.7/includes/themify-metabox/includes/themify-metabox-core.php#L151
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/themify-popup/tags/1.4.7/includes/themify-metabox/includes/themify-metabox-core.php#L209
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/browser/themify-popup/tags/1.4.7/views/styles.php#L29
plugins.trac.wordpress.org
https://plugins.trac.wordpress.org/changeset?reponame=&old=3749602%40themify-popup&new=3749602%40themify-popup
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/da003985-7fb2-4f5b-bb70-6ec3578ef3e8?source=cve
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