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Wordfence Research and News
Newest
Wordfence Argus Discovers Critical Vulnerability in Ghostscript, the Program That Turns Uploaded PDFs into Thumbnails on Your Server
On September 8, 2026, Artifex released Ghostscript 10.08.0, closing a critical heap buffer overflow that the Wordfence Threat Intelligence team, using Wordfence Argus, discovered and reported sixteen days earlier. It is tracked as CVE-2026-39919 and carries a CVSS score of 9.8 out of 10. A crafted PDF containing a JPEG 2000 image can make Ghostscript write attacker-influenced bytes past the end of a memory buffer. We developed that corruption into unauthenticated remote code execution on a purpose-built WordPress test site.
PSA: Critical Unauthenticated Path Traversal Vulnerability Patched in WordPress Core
WordPress has released security updates for a critical unauthenticated path traversal vulnerability that can lead to local PHP file inclusion and, on affected server and theme configurations, remote code execution.
Wordfence Argus Discovers Critical Vulnerability in libheif, the Library That Opens iPhone Photos on Your Server
Wordfence Argus found a critical CVSS 9.8 vulnerability in libheif, a library many servers use to process HEIC images.
Wordfence Argus Finds Unauthenticated Arbitrary File Upload Vulnerability in Gravity Forms
On August 9th, 2026, Wordfence Argus, created by the Wordfence Threat Intelligence team, discovered an Arbitrary File Upload vulnerability in Gravity Forms, a WordPress plugin estimated to have more than one million active installations.
Wordfence Argus Finds Critical Authentication Bypass in WPMU DEV Dashboard Plugin
On August 19th, 2026, during internal research, I discovered an Authentication Bypass vulnerability in WPMU DEV Dashboard, a WordPress plugin with an estimated 350,000 active installations.
Wordfence Argus Finds Complex 6 Step Critical RCE in Avada Theme with 1 Million Sales
A year ago we wrote that we'd put AI to work across the whole company, turning everyone on the team into a capable AI operator so our defenders could stay ahead of the threat actors attacking the sites we protect.
wp2shell Aftermath: The First Critical Unauthenticated WordPress Core RCE in Nearly a Decade
wp2shell is a critical unauthenticated RCE chain in WordPress Core, patched July 17, 2026.
How to Find Local File Inclusion (LFI) Vulnerabilities in WordPress Plugins and Themes
Learn how to find LFI vulnerabilities in WordPress plugins and themes and earn cash bounties through the Wordfence Bug Bounty Program.
How To Find SQL Injection Vulnerabilities in WordPress Plugins and Themes
SQL Injection (SQLi), a vulnerability almost as old as database-driven web applications themselves (CWE-89), persists as a classic example of failing to neutralize user-supplied input before it's used in a SQL query.
WordPress Security Research Series: Setting Up Your Research Lab
Welcome to Part 3 of the WordPress Security Research Beginner Series!
Breaking WordPress Security Research in your inbox as it happens.
