CVE-2021-24153

Public Exploit
Yoast SEO < 3.4.1 - Authenticated Stored Cross-Site Scripting (XSS)

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.

Category

5.4
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.33%
Third-Party Advisory packetstormsecurity.com Third-Party Advisory wordpress.org Third-Party Advisory wpscan.com
Affected: Unknown Yoast SEO
Published at:
Updated at:

References

Link Tags
https://wpscan.com/vulnerability/77810044-394d-4314-b9a1-20c7dca726dc third party advisory
https://plugins.trac.wordpress.org/changeset/1466243/wordpress-seo third party advisory
https://packetstormsecurity.com/files/138192/ third party advisory vdb entry exploit

Frequently Asked Questions

What is the severity of CVE-2021-24153?
CVE-2021-24153 has been scored as a medium severity vulnerability.
How to fix CVE-2021-24153?
To fix CVE-2021-24153, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-24153 being actively exploited in the wild?
It is possible that CVE-2021-24153 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-24153?
CVE-2021-24153 affects Unknown Yoast SEO.
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