CVE-2021-24159: Rocklobster Contact Form 7

High severity, CVSS 8.8. EPSS: 0.6% chance of exploitation in the next 30 days.

Due to the lack of sanitization and lack of nonce protection on the custom CSS feature, an attacker could craft a request to inject malicious JavaScript on a site using the Contact Form 7 Style WordPress plugin through 3.1.9. If an attacker successfully tricked a site’s administrator into clicking a link or attachment, then the request could be sent and the CSS settings would be successfully updated to include malicious JavaScript.

Affected products

• Rocklobster Contact Form 7: up to and including 3.1.9

Published 2021-04-05. Last modified 2026-06-17.