John Castro

About John Castro

John Castro is Sucuri's Vulnerability Researcher who joined the company in 2015. His main responsibilities include threat intelligence and vulnerability analysis. John's professional experience covers more than a decade of pentesting, vulnerability research and malware analysis. When John isn't working with WordPres plugin vulnerabilities, you might find him hiking or hunting for new restaurants. Connect with him on LinkedIn

September 4, 2020John Castro

Insufficient Privilege Validation in NextScripts: Social Networks Auto-Poster

NextScripts: Social Networks Auto-Poster is a plugin that automatically publishes posts from your blog to your Social Media accounts such as Facebook, Twitter, Google+, Blogger, Tumblr, Flickr, LinkedIn, Instagram, Telegram, YouTube, WordPress, etc. During a routine research audit for our Sucuri Firewall, we discovered a…

August 3, 2020John Castro

Vulnerabilities Digest: July 2020

Relevant Plugins and Vulnerabilities: Plugin Vulnerability Patched Version Installs Asset CleanUp: Page Speed Authenticated XSS 1.4.6.7 80000 Quiz And Survey Master Authenticated Stored XSS 7.0.0 30000 Comments – wpDiscuz 7.0.0…

July 6, 2020John Castro

Vulnerabilities Digest: June 2020

Highlights for June 2020 Cross site scripting is still the most common vulnerability in WordPress Plugins. Bad actors are taking advantage of the lack of restrictions in critical functions and…

June 22, 2020John Castro

Cross Site Scripting in YITH WooCommerce Ajax Product Filter

During a routine research audit for our Sucuri Web Application Firewall, we discovered a cross-site scripting (XSS) vulnerability affecting 100,000+ users of the YITH WooCommerce Ajax Product Filter plugin. Current…

June 19, 2020John Castro

Vulnerable Plugins: June 2020 Update

This is a mid-month update to our regular Monthly Vulnerability Digest, which reveals a number of new patches for disclosed vulnerabilities. Plugin Vulnerability Patched Version Installs Elementor Page Builder Authenticated…

May 29, 2020John Castro

Vulnerabilities Digest: May 2020

Relevant Plugins and Vulnerabilities: Plugin Vulnerability Patched Version Installs WP Product Review Unauthenticated Stored XSS 3.7.6 40000 Form Maker by 10Web Authenticated SQL Injection — 100000 Add-on SweetAlert Contact Form…

May 14, 2020John Castro

Unauthenticated Stored Cross Site Scripting in WP Product Review

During a routine research audit for our Sucuri Firewall, we discovered an Unauthenticated Persistent Cross-Site Scripting (XSS) affecting 40,000+ users of the WP Product Review plugin. Current State of the…

May 1, 2020John Castro

Vulnerabilities Digest: April 2020

Relevant Plugins and Vulnerabilities: Plugin Vulnerability Patched Version Installs Widget Settings Importer/Exporter Stored XSS Closed 40000 Accordion Stored/Reflected XSS 2.2.9 30000 Support Ticket System By Phoeniixx Reflected XSS Closed 2000…

March 27, 2020John Castro

Vulnerabilities Digest: March 2020

Fixed Plugins and Vulnerabilities Plugin Vulnerability Patched Version Installs Cookiebot Reflected Cross-Site Scripting 3.6.1 40000 Data Tables Generator By Supsystic Authenticated Stored XSS 1.9.92 30000 WPvivid Backup Database Leak 0.9.36…

March 2, 2020John Castro

Vulnerabilities Digest: February 2020

Fixed Plugins and Vulnerabilities Plugin Vulnerability Patched Version Installs Duplicator Arbitrary File Download 1.3.28 1000000 Modula Image Gallery Authenticated Stored XSS 2.2.5 70000 Easy Property Listings CSRF 3.4 6000 ThemeREX…

January 28, 2020John Castro

Vulnerabilities Digest: January 2020

Fixed Plugins and Vulnerabilities Plugin Vulnerability Patched Version Installs InfiniteWP Client Login bypass 1.9.4.5 300000 ListingPro Reflected XSS 2.5.4 13000 Travel Booking Stored XSS 2.7.8.6 7627 Real Estate 7 Stored…