CVE-2021-24153

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    CVE-2021-24153

    Published: 5 Apr 2021Last Modified: 8 Sept 2026

    Summary:

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

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -1f22f0756e679d0b474400a6e3c248324d168bdd

    Affected versions

    3.4

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2021-24153 | CVE-DB