High severity8.8NVD Advisory· Published Apr 5, 2021· Updated Jun 17, 2026
CVE-2021-24159
CVE-2021-24159
Description
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.
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Affected products
2- WordPress/Contact Form 7 Styledescription
- Range: <=3.1.9
Patches
Vulnerability mechanics
References
2- wpscan.com/vulnerability/363182f1-9fda-4363-8f6a-be37c4c07aa9nvdThird Party Advisory
- www.wordfence.com/blog/2021/02/unpatched-vulnerability-50000-wp-sites-must-find-alternative-for-contact-form-7-style/nvdThird Party Advisory
News mentions
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