CVE-2021-24930 : What You Need to Know

WordPress Online Booking and Scheduling Plugin – Bookly version before 20.3.1 is vulnerable to Stored Cross-Site Scripting due to improper handling of the Staff Full Name field.

Understanding CVE-2021-24930

This CVE identifies a vulnerability in the WordPress Online Booking and Scheduling Plugin that could allow an attacker to execute malicious scripts.

What is CVE-2021-24930?

The vulnerability in the WordPress Bookly plugin before version 20.3.1 arises from the unescaped output of the Staff Full Name field, opening the door to Stored Cross-Site Scripting attacks.

The Impact of CVE-2021-24930

An attacker could exploit this vulnerability to inject and execute malicious scripts in the context of a user's browser, potentially leading to sensitive data theft or unauthorized actions.

Technical Details of CVE-2021-24930

This section delves into the specifics of the vulnerability, affected systems, and how it can be leveraged.

Vulnerability Description

The issue lies in the failure to properly escape the Staff Full Name input, allowing an attacker to inject malicious scripts that will be executed whenever the user views the vulnerable page.

Affected Systems and Versions

WordPress Online Booking and Scheduling Plugin - Bookly versions prior to 20.3.1 are impacted by this vulnerability.

Exploitation Mechanism

By injecting specially crafted scripts into the Staff Full Name field, an attacker can store malicious code in the database, which will then be executed whenever a user accesses the affected page.

Mitigation and Prevention

Learn how to mitigate the risks posed by CVE-2021-24930 and protect your systems against similar vulnerabilities.

Immediate Steps to Take

If you are using an affected version of the Bookly plugin, consider upgrading to version 20.3.1 or higher to prevent exploitation of this vulnerability.

Long-Term Security Practices

Adopt security best practices such as input validation, output encoding, and regular security audits to reduce the risk of Cross-Site Scripting attacks.

Patching and Updates

Regularly check for plugin updates and security patches from trusted sources to ensure that your WordPress installations remain secure.