CVE-2021-42547 : Vulnerability Insights and Analysis

WordPress plugin Out-of-the-Box by WP Cloud Plugins prior to version 1.20.3 is vulnerable to reflected Cross-Site Scripting (XSS) due to insufficient input validation in the search functionality.

Understanding CVE-2021-42547

This CVE involves a reflected XSS vulnerability in the search feature of the Out-of-the-Box plugin for WordPress, allowing unauthenticated users to execute malicious scripts.

What is CVE-2021-42547?

CVE-2021-42547 is an insufficient input validation vulnerability in the search functionality of the WordPress plugin Out-of-the-Box before version 1.20.3, enabling unauthenticated users to conduct reflected XSS attacks.

The Impact of CVE-2021-42547

The vulnerability has a CVSS base score of 4.7, posing a medium risk. It requires user interaction and has a low attack complexity, potentially leading to the execution of malicious scripts.

Technical Details of CVE-2021-42547

The following technical details provide insight into the vulnerability and its implications.

Vulnerability Description

Type: Cross-site Scripting (XSS)
Description: Insufficient input validation allows unauthenticated users to craft a reflected XSS attack through the search functionality.

Affected Systems and Versions

Product: Out-of-the-Box
Vendor: WP Cloud Plugins
Versions Affected: < 1.20.3

Exploitation Mechanism

The vulnerability can be exploited by unauthenticated users manipulating search parameters to inject and execute malicious scripts.

Mitigation and Prevention

To safeguard your systems from CVE-2021-42547, take the following preventive measures.

Immediate Steps to Take

Update the Out-of-the-Box plugin to version 1.20.3 or above.
Monitor user input for search queries to detect and prevent potential XSS attempts.

Long-Term Security Practices

Conduct regular security audits and penetration testing on WordPress plugins to identify vulnerabilities.
Educate users on safe browsing habits and the risks associated with executing untrusted scripts.

Patching and Updates

Ensure timely installation of security patches and updates for WordPress plugins to address known vulnerabilities.