Backdoored Smart Slider 3 Pro Update Distributes Backdoor
🔒 A compromised update for Smart Slider 3 Pro (v3.5.1.35) was delivered through the plugin’s official update channel on April 7, 2026, and remained accessible for roughly six hours before detection. Security firm Patchstack and maintainer Nextend confirmed unauthorized access to Nextend’s update infrastructure and a fully attacker-authored build was distributed. The trojanized update installs a multi-stage backdoor that provides pre-authenticated RCE, hidden administrative accounts, multi-location persistence, and automatic data exfiltration to a command-and-control domain; operators should update to v3.5.1.36 and audit affected sites. The free Smart Slider edition is not impacted.
