CVE-2021-34667 : Vulnerability Insights and Analysis

A detailed overview of CVE-2021-34667, a vulnerability in the Calendar_plugin WordPress plugin that allows for Reflected Cross-Site Scripting.

Understanding CVE-2021-34667

This section will delve into the impact, technical details, and mitigation strategies related to CVE-2021-34667.

What is CVE-2021-34667?

The Calendar_plugin WordPress plugin up to version 1.0 is susceptible to Reflected Cross-Site Scripting, enabling attackers to inject malicious web scripts.

The Impact of CVE-2021-34667

The vulnerability's CVSS base score is 6.1, with a medium severity level. Attackers can exploit this flaw without requiring any specific privileges, potentially compromising confidentiality and integrity.

Technical Details of CVE-2021-34667

Let's explore the specifics of the vulnerability, including the affected systems, exploitation methods, and more.

Vulnerability Description

The issue arises from the usage of

$_SERVER['PHP_SELF']

in the ~/calendar.php file, which facilitates the injection of arbitrary web scripts.

Affected Systems and Versions

The vulnerability impacts all versions of the Calendar_plugin WordPress plugin up to and including 1.0.

Exploitation Mechanism

By leveraging the Reflected Cross-Site Scripting flaw, malicious actors can inject and execute arbitrary scripts within the context of an unsuspecting user.

Mitigation and Prevention

Discover the immediate steps and long-term security practices necessary to mitigate the risks associated with CVE-2021-34667.

Immediate Steps to Take

One effective measure to safeguard against this vulnerability is to uninstall the Calendar_plugin WordPress plugin immediately.

Long-Term Security Practices

In addition to removing the plugin, it is imperative to maintain a proactive approach towards security, ensuring regular software updates and security patches.

Patching and Updates

Stay informed about any patches or updates released by the plugin developer to address the vulnerability and enhance the plugin's security posture.