Vulnerability CVE-2021-24153
Published: 2021-04-05

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.

Type:

CWE-79

 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'))

CVSS2 => (AV:N/AC:M/Au:S/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
3.5/10
2.9/10
6.8/10
Exploit range
Attack complexity
Authentication
Remote
Medium
Single time
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
Yoast -> Yoast seo 

 References:
https://packetstormsecurity.com/files/138192/
https://plugins.trac.wordpress.org/changeset/1466243/wordpress-seo
https://wpscan.com/vulnerability/77810044-394d-4314-b9a1-20c7dca726dc
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