CVE-2021-25117 : Vulnerability Insights and Analysis

A stored cross-site scripting (XSS) vulnerability has been identified in the WP Postratings WordPress plugin before version 1.86.1, impacting the WP-PostRatings product.

Understanding CVE-2021-25117

This CVE involves an unvalidated postratings_image parameter on the options page of the WP Postratings WordPress plugin, making it susceptible to XSS attacks.

What is CVE-2021-25117?

The WP-PostRatings WordPress plugin before 1.86.1 fails to properly sanitize user input, specifically the postratings_image parameter on its options page. This oversight enables attackers to execute malicious scripts in the context of an administrator’s session, even if unfiltered_html capability is disabled.

The Impact of CVE-2021-25117

Exploitation of this vulnerability could lead to unauthorized actions performed on behalf of administrators, potentially compromising the security and integrity of the WordPress site.

Technical Details of CVE-2021-25117

This section delves into the specific technical aspects of the CVE.

Vulnerability Description

The vulnerability arises from the lack of sanitization of the postratings_image parameter, allowing threat actors to inject and execute malicious scripts within an administrator's session.

Affected Systems and Versions

The WP-PostRatings product versions prior to 1.86.1 are affected by this vulnerability, emphasizing the importance of updating to the latest version.

Exploitation Mechanism

By manipulating the postratings_image parameter via a crafted payload, attackers can insert arbitrary scripts that get executed within an administrator's context, posing a significant XSS risk.

Mitigation and Prevention

Learn how to address and prevent CVE-2021-25117 to enhance the security posture of your WordPress installation.

Immediate Steps to Take

Administrators should update the WP-PostRatings plugin to version 1.86.1 or newer to mitigate the XSS vulnerability and enhance security.

Long-Term Security Practices

Implement routine security audits, maintain plugin updates, and educate users on secure coding practices to fortify your WordPress site against potential threats.

Patching and Updates

Regularly monitor for plugin updates and security patches, promptly applying them to ensure your WordPress ecosystem remains safeguarded against emerging vulnerabilities.