CVE-2023-4390: Popup box < 3.7.2 - Admin+ Stored Cross-Site Scripting

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-10-31 · updated 2026-06-17
Weakness: CWE-79

Description

The Popup box WordPress plugin before 3.7.2 does not sanitize and escape some Popup fields, which could allow high-privilege users such as an administrator to inject arbitrary web scripts even when the unfiltered_html capability is disallowed (for example in a multisite setup).

Affected products

Ays Pro Popup box: before 3.7.2 — fixed in 3.7.2

How to fix

Upgrade to a fixed version: Ays Pro Popup box 3.7.2. Check the vendor advisory for mitigations.

References

https://wpscan.com/vulnerability/9fd2eb81-185d-4d42-8acf-925664b7cb2f
https://wpscan.com/vulnerability/9fd2eb81-185d-4d42-8acf-925664b7cb2f

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