Popup Builder – Create highly converting, mobile friendly marketing popups. <= 4.4.1 - Authenticated (Contributor+) Stored Cross-Site Scripting
| CVE | CVE-2025-9856 |
|---|---|
| CVSS | 6.4 (Medium) |
| Publicly Published | December 12, 2025 |
| Last Updated | December 13, 2025 |
| Researcher |
Naoya Takahashi (nakko)
|
Description
The Popup Builder – Create highly converting, mobile friendly marketing popups. plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'sg_popup' shortcode in all versions up to, and including, 4.4.1 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.
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Vulnerability Details for Popup Builder – Create highly converting, mobile friendly marketing popups.
| Software Type | Plugin |
|---|---|
| Software Slug | popup-builder (view on wordpress.org) |
| Patched? | Yes |
| Remediation | Update to version 4.4.2, or a newer patched version |
| Affected Version |
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| Patched Version |
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Recent vulnerabilities in Popup Builder – Create highly converting, mobile friendly marketing popups.
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