How severe is CVE-2025-9856?

Medium severity. CVSS v3 base score is 6.4 out of 10.

XSS in Popupbuilder Popup Builder – Create Highly Converting, Mobile Friendly Marketing Popups.

CVE-2025-9856

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 insu…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (11.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Popupbuilder Popup Builder – Create Highly Converting, Mobile Friendly Marketing Popups. — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2025-9856?: CVE-2025-9856 is a medium-severity vulnerability in Popupbuilder Popup Builder – Create Highly Converting, Mobile Friendly Marketing Popups., classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2025-12-13.
How severe is CVE-2025-9856?: Medium severity. CVSS v3 base score is 6.4 out of 10.