Detections
Analytics

CVE-2021-24153

medium

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.

References

https://wpscan.com/vulnerability/77810044-394d-4314-b9a1-20c7dca726dc

https://plugins.trac.wordpress.org/changeset/1466243/wordpress-seo

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

Details

Source: Mitre, NVD

Published: 2021-04-05

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 3.5

Vector: CVSS2#AV:N/AC:M/Au:S/C:N/I:P/A:N

Severity: Low

CVSS v3

Base Score: 5.4

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Severity: Medium

EPSS

EPSS: 0.00334