CVE-2020-4047 : Vulnerability Insights and Analysis

In affected versions of WordPress, authenticated users with upload permissions can inject JavaScript into media file attachment pages, leading to script execution in the context of a higher privileged user.

Understanding CVE-2020-4047

This CVE involves an authenticated XSS vulnerability in WordPress versions prior to 5.4.2.

What is CVE-2020-4047?

In affected versions of WordPress, authenticated users with upload permissions can inject JavaScript into some media file attachment pages, potentially leading to script execution in the context of a higher privileged user.

The Impact of CVE-2020-4047

The vulnerability has a CVSS base score of 6.8, with medium severity. It can result in high integrity impact when exploited.

Technical Details of CVE-2020-4047

This section provides more technical insights into the vulnerability.

Vulnerability Description

Authenticated users can inject JavaScript into media file attachment pages, allowing script execution in the context of a higher privileged user.

Affected Systems and Versions

WordPress versions >= 3.7.0 and < 5.4.2 are affected.

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Privileges Required: Low
User Interaction: Required
Scope: Changed
Integrity Impact: High
Confidentiality Impact: None
Availability Impact: None

Mitigation and Prevention

Protect your systems from CVE-2020-4047 with the following measures.

Immediate Steps to Take

Update WordPress to version 5.4.2 or later to patch the vulnerability.
Restrict upload permissions for users to minimize the risk of exploitation.

Long-Term Security Practices

Regularly monitor and audit user permissions and activities within WordPress.
Educate users on safe uploading practices and potential security risks.

Patching and Updates

Stay informed about security updates and apply patches promptly to mitigate known vulnerabilities.