CVE-2021-24145 : What You Need to Know

A detailed overview of the CVE-2021-24145 highlighting the vulnerability in the Modern Events Calendar Lite plugin.

Understanding CVE-2021-24145

This section covers the essential aspects of the CVE-2021-24145 vulnerability in the Modern Events Calendar Lite plugin.

What is CVE-2021-24145?

The vulnerability in the Modern Events Calendar Lite plugin before version 5.16.5 allows an attacker to upload arbitrary PHP files via an authenticated arbitrary file upload leading to possible remote code execution (RCE).

The Impact of CVE-2021-24145

The impact of this vulnerability includes unauthorized access to the target system, potential data loss, and the execution of malicious scripts by an attacker, compromising the security and integrity of the WordPress website hosting the vulnerable plugin.

Technical Details of CVE-2021-24145

This section delves into the technical specifics of CVE-2021-24145.

Vulnerability Description

The vulnerability arises from improper file type validation in the file upload mechanism of the Modern Events Calendar Lite plugin, enabling authorized users to upload PHP files disguised as 'text/csv' files.

Affected Systems and Versions

The Modern Events Calendar Lite plugin versions prior to 5.16.5 are susceptible to this vulnerability, highlighting the importance of updating to the latest secure version.

Exploitation Mechanism

An attacker with authenticated access can exploit this vulnerability by uploading a malicious PHP file under the guise of a 'text/csv' file, potentially leading to remote code execution on the target system.

Mitigation and Prevention

This section provides insights into mitigating the risks associated with CVE-2021-24145.

Immediate Steps to Take

Website administrators should immediately update the Modern Events Calendar Lite plugin to version 5.16.5 or newer to patch the vulnerability and prevent potential exploitation.

Long-Term Security Practices

Implementing proper input validation, file type verification, and access controls can enhance the overall security posture of WordPress websites and minimize the risk of similar vulnerabilities.

Patching and Updates

Regularly monitor for plugin updates and security advisories to promptly address known vulnerabilities, ensuring the timely application of patches to safeguard against potential threats.