What’s Vulnerable › Vulnerabilities

CVE-2025-9856: Popup Builder – Create highly converting, mobile friendly marketing popups. <= 4.4.1 - Authenticated (Contributor+) Stored Cross-Site Scripting

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-13 · updated 2026-10-07
• Weakness: CWE-79

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.

Affected products

• Popup Builder: through 4.4.1

References

• https://plugins.trac.wordpress.org/browser/popup-builder/tags/4.4.0/com/classes/popups/SGPopup.php#L1368
• https://plugins.trac.wordpress.org/browser/popup-builder/tags/4.4.0/com/helpers/AdminHelper.php#L438
• https://plugins.trac.wordpress.org/changeset/3384281
• https://www.wordfence.com/threat-intel/vulnerabilities/id/beb6b26a-3fe1-44e0-9fda-97b288abf735?source=cve

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