CVE-2021-24153

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

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.

Affected

Yoast SEO

CVSS v3.1 NVD

5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CVSS v2.0 NVD

3.5 LOWAV:N/AC:M/Au:S/C:N/I:P/A:N

EPSS

1.11% chance of exploitation in the next 30 days, 66th percentile

Published

2021-04-05

Updated

2024-08-03

Proof-of-concept exploits (1)

• https://packetstormsecurity.com/files/138192/

Security advisories

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

References

• CVE Record
• NVD entry