QID 154103

Date Published: 2021-12-02

QID 154103: WordPress Authenticated Cross Site Scripting Vulnerability (CVE-2021-39201)

WordPress is an open-source blogging tool and content management system based on PHP and MySQL. It has many features including a plug-in architecture and a template system.

The installed version of WordPress CMS allow an authenticated but low-privileged user (like contributor/author) to execute XSS in the editor. This bypasses the restrictions imposed on users who do not have the permission to post "unfiltered_html".

Affected versions:
WordPress 5.0 to 5.7.2

Successful exploitation would lead attackers to inject HTML or JavaScript via a cross-site scripting, which can help the attacker carry out further attacks and obtain sensitive information.

  • CVSS V3 rated as Medium - 5.4 severity.
  • CVSS V2 rated as Medium - 3.5 severity.
    • Solution
    Customers are advised to upgrade to a fixed version WordPress 5.8 or later versions to remediate this vulnerability.
    Vendor References

    CVEs related to QID 154103

    CVE-2021-39201 |
    Software Advisories
    Advisory ID Software Component Link
    WordPress URL Logo wordpress.org/download/releases/
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