CVE-2021-39311 Explained : Impact and Mitigation

This CVE details a vulnerability in the link-list-manager WordPress plugin that allows for Reflected Cross-Site Scripting.

Understanding CVE-2021-39311

This CVE describes a security issue in the link-list-manager WordPress plugin version 1.0 and below.

What is CVE-2021-39311?

The link-list-manager WordPress plugin is susceptible to Reflected Cross-Site Scripting through the category parameter in the ~/llm.php file, enabling malicious users to inject arbitrary web scripts.

The Impact of CVE-2021-39311

With a CVSS base score of 6.1 (Medium severity), this vulnerability requires user interaction but can potentially compromise confidentiality and integrity.

Technical Details of CVE-2021-39311

This section delves into specific aspects of the CVE.

Vulnerability Description

The flaw in the link-list-manager WordPress plugin allows attackers to perform Reflected Cross-Site Scripting through the category parameter in the ~/llm.php file.

Affected Systems and Versions

Product: link-list-manager
Vendor: link-list-manager
Versions affected: <= 1.0 (including 1.0)

Exploitation Mechanism

The vulnerability is exploited by injecting malicious web scripts via the category parameter in the specified file.

Mitigation and Prevention

Protecting systems from this vulnerability is crucial.

Immediate Steps to Take

Uninstall the link-list-manager plugin from the WordPress site to eliminate the risk of exploitation.

Long-Term Security Practices

Regularly update and patch all plugins and themes to prevent similar vulnerabilities.
Educate users on safe browsing practices to reduce the likelihood of XSS attacks.

Patching and Updates

Stay informed about security updates for the WordPress plugins and promptly apply any patches or updates provided.