PT-2025-51109 · WordPress · Popup Builder

Naoya Takahashi · Published 2025-12-13 · Updated 2025-12-13 · CVE-2025-9856

Positive Technologies (AI Summary)

CVSS v3.1

6.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Popup Builder plugin for WordPress versions up to and including 4.4.1

Description The Popup Builder plugin for WordPress is susceptible to Stored Cross-Site Scripting. This is due to insufficient input sanitization and output escaping on user-supplied attributes within the plugin’s sg popup shortcode. Authenticated attackers with contributor-level access or higher can inject arbitrary web scripts into pages. These scripts will execute when a user accesses the affected page.

Recommendations Update the Popup Builder plugin to a version later than 4.4.1.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2025-9856

Affected Products

Popup Builder

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2025-9856 · Security Note
• https://wordfence.com/threat-intel/vulnerabilities/id/beb6b26a-3fe1-44e0-9fda-97b288abf735?source=cve · Note
• https://plugins.trac.wordpress.org/browser/popup-builder/tags/4.4.0/com/helpers/AdminHelper.php#L438 · Note
• https://twitter.com/CVEnew/status/1999865317850497148 · Twitter Post
• https://t.me/CVEtracker/39720 · Telegram Post
• https://twitter.com/VulmonFeeds/status/1999890448379265101 · Twitter Post
• https://plugins.trac.wordpress.org/browser/popup-builder/tags/4.4.0/com/classes/popups/SGPopup.php#L1368 · Note
• https://plugins.trac.wordpress.org/changeset/3384281 · Note