Medium severity5.4NVD Advisory· Published Apr 5, 2021· Updated Jun 17, 2026
CVE-2021-24153
CVE-2021-24153
Description
A Stored Cross-Site Scripting vulnerability was discovered in the Yoast SEO WordPress plugin before 3.4.1, which had built-in blacklist filters which were blacklisting Parenthesis as well as several functions such as alert but bypasses were found.
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Affected products
2- Yoast SEO/Yoast SEOdescription
Patches
Vulnerability mechanics
References
3- packetstormsecurity.com/files/138192/nvdExploitThird Party AdvisoryVDB Entry
- plugins.trac.wordpress.org/changeset/1466243/wordpress-seonvdThird Party Advisory
- wpscan.com/vulnerability/77810044-394d-4314-b9a1-20c7dca726dcnvdThird Party Advisory
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