CVE-2024-8547: Simple Popup Plugin <= 4.5 - Authenticated (Contributor+) Stored Cross-Site Scripting

Severity: medium (CVSS 5.4 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: none known
Published: 2024-09-28 · updated 2026-06-17
Weakness: CWE-79

Description

The Simple Popup Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's [popup] shortcode in all versions up to, and including, 4.5 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

grimmdude Simple Popup Plugin: through 4.5

References

https://plugins.trac.wordpress.org/browser/simple-popup-plugin/tags/4.5/simple_popup_plugin.php#L87
https://plugins.trac.wordpress.org/changeset/3160218/#file7
https://www.wordfence.com/threat-intel/vulnerabilities/id/217da4de-38df-41ff-b138-f12d4f8999cd?source=cve

Get alerted when CVE-2024-8547 or the next vulnerability affects your stack