CVE-2019-20204 – WordPress Postie Plugin Vulnerability

By Threat Simplified • 1/2/2020

# CVE-2019-20204 – Important Information About the Vulnerability in Postie Plugin ## Summary A security vulnerability has been discovered in version 1.9.40 of the Postie plugin for WordPress, which can allow attackers to execute harmful scripts on websites. This article explains what th

CVE-2019-20204 – WordPress Postie Plugin Vulnerability

CVE-2019-20204 – Important Information About the Vulnerability in Postie Plugin

Summary

A security vulnerability has been discovered in version 1.9.40 of the Postie plugin for WordPress, which can allow attackers to execute harmful scripts on websites. This article explains what this vulnerability is, its potential impact, and how you can protect yourself and your website.

What Happened?

The Postie plugin, widely used by WordPress users to manage email posts, has a *Cross-Site Scripting (XSS)* vulnerability. This means that an attacker could inject malicious scripts into your website, using a specific code pattern that starts with jaVasCript:/* and includes a manipulated SVG (Scalable Vector Graphics) element. If successfully executed, these scripts could lead to unauthorized data access, website damage, or even further exploits.

Effects and Protection Strategies

As a website owner, it’s crucial to be vigilant about potential security threats. These are the key signs to watch for:

  • Unusual Website Behavior: If your site behaves erratically (like unexpected redirects or pop-ups), it may be an indication of an XSS attack.
  • Input Field Issues: If users can submit JavaScript or SVG code through forms or comments without any restrictions, your site could be at risk.

To protect your website, consider these essential steps:

  • Update the Plugin: Always use the latest version of the Postie plugin to benefit from security fixes.
  • Sanitize User Inputs: Implement checks to ensure user-generated content is safe and doesn't contain harmful scripts.
  • Install Security Plugins: Use security tools designed to detect and prevent XSS vulnerabilities.
  • Conduct Regular Security Audits: Periodically check for vulnerabilities to keep your site secure.
  • Stay Informed: Educate yourself and your team about the latest cybersecurity threats and best practices.

By staying informed and taking proactive measures, you can safeguard your WordPress site from potential attacks and provide a safer browsing experience for your visitors.