CVE-2021-24606 Explained : Impact and Mitigation

The Availability Calendar WordPress plugin before version 1.2.1 is prone to an authenticated SQL Injection vulnerability that allows any user capable of adding shortcode to posts/pages to exploit the issue.

Understanding CVE-2021-24606

This CVE-2021-24606 pertains to an SQL Injection flaw in the Availability Calendar WordPress plugin, potentially exploitable by contributors and higher roles.

What is CVE-2021-24606?

The CVE-2021-24606 vulnerability exists in the plugin's failure to properly escape the category attribute from its shortcode, enabling SQL Injection attacks.

The Impact of CVE-2021-24606

The security issue could be exploited by authenticated users like contributors to execute malicious SQL queries, leading to data compromise and potential website takeover.

Technical Details of CVE-2021-24606

This section details the vulnerability description, affected systems, versions, and the exploitation mechanism.

Vulnerability Description

The flaw arises due to the plugin's insufficient validation and sanitization of user input, allowing for manipulated SQL injection queries.

Affected Systems and Versions

The vulnerability affects the Availability Calendar plugin versions prior to 1.2.1, making websites utilizing these versions susceptible to exploitation.

Exploitation Mechanism

By injecting malicious SQL commands through the category attribute of the plugin's shortcode, authorized users can perform unauthorized actions on the WordPress site.

Mitigation and Prevention

Learn about the immediate steps to take and long-term security practices to mitigate the CVE-2021-24606 risk.

Immediate Steps to Take

Update the plugin to version 1.2.1 or newer to patch the SQL Injection vulnerability.
Regularly monitor user inputs and sanitize data to prevent similar attacks.

Long-Term Security Practices

Conduct regular security audits and code reviews to detect and address vulnerabilities promptly.
Educate users on secure coding practices to minimize the risk of SQL Injection and other injection attacks.

Patching and Updates

Stay informed about security updates and patches released by the plugin vendor to address known vulnerabilities and enhance website security.