CVE-2021-39332 : Vulnerability Insights and Analysis

The Business Manager WordPress plugin is vulnerable to Stored Cross-Site Scripting, allowing attackers to inject web scripts due to insufficient input validation and sanitization.

Understanding CVE-2021-39332

This CVE involves an Authenticated Stored Cross-Site Scripting vulnerability in the Business Manager plugin.

What is CVE-2021-39332?

The Business Manager WordPress plugin version 1.4.5 and below are prone to Stored Cross-Site Scripting (XSS) due to inadequate input validation, enabling administrative users to inject malicious scripts. This especially impacts installations with restricted unfiltered_html permissions.

The Impact of CVE-2021-39332

The vulnerability has a CVSS base score of 5.5 (medium severity) with low confidentiality and integrity impacts. Attackers with high privileges can exploit this to alter the plugin's scope.

Technical Details of CVE-2021-39332

This section covers the specific details of the vulnerability.

Vulnerability Description

The flaw in the Business Manager plugin allows attackers with admin access to execute unauthorized scripts through inadequate validation.

Affected Systems and Versions

Product: Business Manager
Vendor: Business Manager
Versions: Up to and including 1.4.5

Exploitation Mechanism

Attackers can target sites with disabled unfiltered_html permissions for administrators, leveraging this access to inject malicious scripts.

Mitigation and Prevention

Steps to address and prevent exploitation of CVE-2021-39332.

Immediate Steps to Take

Uninstall the vulnerable WordPress plugin immediately.

Long-Term Security Practices

Regularly monitor and update plugins and WordPress installations.
Implement principle of least privilege to restrict admin access.

Patching and Updates

Keep abreast of security advisories and apply patches promptly to ensure protection against known vulnerabilities.