CVE-2021-25040 : What You Need to Know
Learn about CVE-2021-25040, a WordPress plugin vulnerability allowing Reflected Cross-Site Scripting. Explore impacts, technical details, and mitigation steps here.
A detailed overview of CVE-2021-25040, a vulnerability in the Booking Calendar WordPress plugin before version 8.9.2 that leads to Reflected Cross-Site Scripting (XSS).
Understanding CVE-2021-25040
This section provides insights into the nature of the vulnerability and its implications.
What is CVE-2021-25040?
The Booking Calendar WordPress plugin before version 8.9.2 fails to properly sanitize the booking_type parameter, resulting in a Reflected Cross-Site Scripting vulnerability.
The Impact of CVE-2021-25040
The vulnerability could allow an attacker to execute malicious scripts in the context of an administrative user, potentially compromising sensitive data or taking control of the affected WordPress site.
Technical Details of CVE-2021-25040
Explore the technical aspects of the CVE to better understand the underlying risks.
Vulnerability Description
The flaw arises from the lack of sanitization of user-supplied data in the booking_type parameter, enabling an attacker to inject and execute arbitrary scripts.
Affected Systems and Versions
Only installations of the Booking Calendar plugin before version 8.9.2 are susceptible to this vulnerability.
Exploitation Mechanism
Attackers can exploit this issue by manipulating the booking_type parameter in URLs or forms to inject malicious scripts, which are then executed in the browser of an admin user.
Mitigation and Prevention
Discover actionable steps to mitigate the risks posed by CVE-2021-25040 and safeguard WordPress sites.
Immediate Steps to Take
Site administrators should update the Booking Calendar plugin to version 8.9.2 or newer to address the vulnerability. Additionally, input validation and output encoding practices must be implemented to prevent XSS attacks.
Long-Term Security Practices
Regular security audits, monitoring for suspicious activities, and educating users on safe browsing practices are vital for enhancing overall security posture.
Patching and Updates
Stay informed about security patches and updates released by plugin developers and promptly apply them to ensure the protection of WordPress installations.