CVE-2021-24837 : Vulnerability Insights and Analysis

Passster < 3.5.5.8 - Contributor+ Stored Cross-Site Scripting

Understanding CVE-2021-24837

This CVE relates to a security vulnerability in the Passster WordPress plugin that allows users with roles as low as Contributor to carry out Cross-Site Scripting attacks.

What is CVE-2021-24837?

The Passster WordPress plugin before version 3.5.5.8 does not properly escape the area parameter of its shortcode, opening the door for potential Cross-Site Scripting vulnerabilities.

The Impact of CVE-2021-24837

Exploitation of this vulnerability could lead to unauthorized access, data theft, and the potential for further attacks on affected WordPress websites.

Technical Details of CVE-2021-24837

Vulnerability Description

The issue arises from the Passster plugin's failure to escape the area parameter of its shortcode, enabling users with low-level roles to execute malicious scripts.

Affected Systems and Versions

The Passster plugin versions prior to 3.5.5.8 are affected by this vulnerability. Users with versions below this are at risk of exploitation.

Exploitation Mechanism

Attackers can exploit this vulnerability by inputting malicious scripts through the area parameter of the Passster plugin's shortcode, leveraging the lack of proper escaping mechanisms.

Mitigation and Prevention

Immediate Steps to Take

WordPress site administrators are advised to update the Passster plugin to version 3.5.5.8 or newer to mitigate the risk of Cross-Site Scripting attacks.

Long-Term Security Practices

In addition to updating the plugin, implementing proper input validation and output escaping techniques in WordPress plugins can help prevent Cross-Site Scripting vulnerabilities.

Patching and Updates

Regularly monitoring for plugin updates and promptly applying patches provided by plugin developers can safeguard WordPress sites against known vulnerabilities.