What the vulnerability does
01Description
Smart Slider 3 Pro version 3.5.1.35 for WordPress and Joomla contains a multi-stage remote access toolkit injected through a compromised update system that allows unauthenticated attackers to execute arbitrary code and commands. Attackers can trigger pre-authentication remote shell execution via HTTP headers, establish authenticated backdoors accepting arbitrary PHP code or OS commands, create hidden administrator accounts, exfiltrate credentials and access keys, and maintain persistence through multiple injection points including must-use plugins and core file modifications.
Explanation of Vulnerability in Simple Terms
02Summary
Smart Slider 3 Pro contains a code injection vulnerability affecting version 3.5.1.35. An attacker with network access and no authentication can inject and execute arbitrary code on the site. The vulnerability stems from insufficient input validation in a core component. Site administrators should update immediately to a patched version.
What an attacker can do
03Attacker Capabilities
Run arbitrary code on the site without authentication.
Potential impact on your site
04Site Impact
Complete site compromise: attacker can modify content, steal data, create backdoors, or take the site offline.
Conditions required to exploit
05Prerequisites
Network access only; no authentication or user interaction required.
Key dates
06Disclosure timeline
April 9, 2026
CVE published
May 14, 2026
Record updated
