CVE-2021-24684 : Exploit Details and Defense Strategies

The WordPress PDF Light Viewer Plugin WordPress plugin before 1.4.12 allows users with Author roles to execute arbitrary OS command on the server via OS Command Injection when invoking Ghostscript.

Understanding CVE-2021-24684

This CVE highlights a vulnerability in the WordPress PDF Light Viewer Plugin that enables users with Author roles to perform unauthorized OS command executions on the server through OS Command Injection.

What is CVE-2021-24684?

The CVE-2021-24684 vulnerability exists in versions of the WordPress PDF Light Viewer Plugin prior to 1.4.12, allowing users with Author privileges to execute arbitrary OS commands via OS Command Injection, particularly when utilizing Ghostscript.

The Impact of CVE-2021-24684

Exploitation of this vulnerability could lead to unauthorized access to sensitive server operations, compromising the security and integrity of the affected website or server.

Technical Details of CVE-2021-24684

This section delves into the specific technical aspects of the CVE, including the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability in the WordPress PDF Light Viewer Plugin permits users with Author permissions to conduct unauthorized OS command executions on the server by leveraging OS Command Injection, specifically when interacting with Ghostscript.

Affected Systems and Versions

The affected product is the WordPress PDF Light Viewer Plugin with versions prior to 1.4.12. Users utilizing versions older than 1.4.12 are susceptible to the security risks posed by CVE-2021-24684.

Exploitation Mechanism

The vulnerability can be exploited by users holding Author roles who can trigger OS Command Injections when invoking Ghostscript, thereby gaining unauthorized access to execute malicious commands on the server.

Mitigation and Prevention

In this section, we explore the necessary steps to mitigate the risks associated with CVE-2021-24684, both in the short term and the long term, emphasizing the importance of applying patches and updates.

Immediate Steps to Take

Website administrators are advised to update the WordPress PDF Light Viewer Plugin to version 1.4.12 or later to remediate the vulnerability and prevent unauthorized OS command executions by users with Author roles.

Long-Term Security Practices

Implement proactive security measures such as regular security audits, user role restrictions, and continuous monitoring to safeguard against similar vulnerabilities and unauthorized access attempts in the future.

Patching and Updates

Stay informed about security patches and updates released by the plugin vendor to address known vulnerabilities and enhance the security posture of the WordPress PDF Light Viewer Plugin.