CVE-2021-24793 : Security Advisory and Response

The WPeMatico RSS Feed Fetcher WordPress plugin before version 2.6.12 is vulnerable to a stored Cross-Site Scripting (XSS) attack, allowing high privilege users to execute malicious scripts on affected websites.

Understanding CVE-2021-24793

This CVE identifies a security flaw in the WPeMatico RSS Feed Fetcher WordPress plugin that could be exploited by attackers to perform XSS attacks, even with restricted capabilities.

What is CVE-2021-24793?

The WPeMatico RSS Feed Fetcher WordPress plugin version less than 2.6.12 allows high privilege users to carry out Cross-Site Scripting attacks by not properly escaping the Feed URL in campaign attributes.

The Impact of CVE-2021-24793

The vulnerability enables attackers to inject malicious scripts into the campaign attributes, potentially leading to unauthorized actions and data theft on affected websites.

Technical Details of CVE-2021-24793

This section outlines the specific technical aspects of the vulnerability.

Vulnerability Description

The issue arises from the plugin failing to escape the Feed URL added to a campaign, thereby providing an opportunity for attackers to inject malicious scripts.

Affected Systems and Versions

WPeMatico RSS Feed Fetcher plugin versions below 2.6.12 are affected by this vulnerability.

Exploitation Mechanism

Attackers, even with restricted capabilities, can exploit this flaw by inserting malicious scripts into specific campaign attributes.

Mitigation and Prevention

To safeguard your systems from CVE-2021-24793, follow these security measures.

Immediate Steps to Take

Update the WPeMatico RSS Feed Fetcher plugin to version 2.6.12 or higher.
Consider revoking high privilege user access if not necessary.

Long-Term Security Practices

Regularly monitor plugin updates and security advisories.
Implement content security policies to mitigate XSS attacks.

Patching and Updates

Stay informed about security patches and update your WordPress plugins promptly to prevent potential exploits.