CVE-2021-24153

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.
Cross-site Scripting
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.4 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
WPScanCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 55%
VendorProductVersion
yoastyoast_seo
𝑥
< 3.4.1
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://packetstormsecurity.com/files/138192/
https://plugins.trac.wordpress.org/changeset/1466243/wordpress-seo
https://wpscan.com/vulnerability/77810044-394d-4314-b9a1-20c7dca726dc
https://packetstormsecurity.com/files/138192/
https://plugins.trac.wordpress.org/changeset/1466243/wordpress-seo
https://wpscan.com/vulnerability/77810044-394d-4314-b9a1-20c7dca726dc