CVE-2021-42362 : Vulnerability Insights and Analysis

WordPress Popular Posts WordPress plugin <= 5.3.2 is vulnerable to authenticated arbitrary file uploads, potentially leading to remote code execution.

Understanding CVE-2021-42362

The WordPress Popular Posts plugin allows attackers with contributor-level access and above to upload malicious files through insufficient input file type validation, affecting versions up to and including 5.3.2.

What is CVE-2021-42362?

The vulnerability in WordPress Popular Posts plugin allows unauthorized users to upload arbitrary files, leading to potential remote code execution.

The Impact of CVE-2021-42362

The vulnerability's impact is rated as HIGH, with a base score of 8.8 in the CVSSv3.1 system. Attackers can compromise the confidentiality, integrity, and availability of the affected systems.

Technical Details of CVE-2021-42362

The technical details shed light on the vulnerability's specifics and affected systems.

Vulnerability Description

The issue arises from insufficient input file type validation in the ~/src/Image.php file.

Affected Systems and Versions

WordPress Popular Posts plugin versions <= 5.3.2 are susceptible to this vulnerability.

Exploitation Mechanism

Attackers with contributor level access and above can exploit this vulnerability to upload malicious files for potential remote code execution.

Mitigation and Prevention

To safeguard systems, immediate steps and long-term security practices need to be implemented.

Immediate Steps to Take

Update the plugin to version 5.3.3 or newer.

Long-Term Security Practices

Regularly monitor and update plugins and extensions.
Employ the principle of least privilege to restrict user access.

Patching and Updates

Apply patches provided by the plugin vendor to address the vulnerability effectively.