🔐 CVE Alert

CVE-2026-34424

CRITICAL 9.8

Smart Slider 3 Pro 3.5.1.35 Supply Chain Attack Remote Access Toolkit

CVSS Score
9.8
EPSS Score
0.2%
EPSS Percentile
36th

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.

CWE CWE-506
Vendor nextendweb
Product smart slider 3 pro for wordpress
Published Apr 9, 2026
Last Updated Apr 14, 2026
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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Affected Versions

Nextendweb / Smart Slider 3 Pro for WordPress
3.5.1.35
Nextendweb / Smart Slider 3 Pro for Joomla
3.5.1.35

References

NVD ↗ CVE.org ↗ EPSS Data ↗
smartslider.helpscoutdocs.com: https://smartslider.helpscoutdocs.com/article/2144-wordpress-security-advisory-smart-slider-3-pro-3-5-1-35-compromise smartslider.helpscoutdocs.com: https://smartslider.helpscoutdocs.com/article/2143-joomla-security-advisory-smart-slider-3-pro-3-5-1-35-compromise patchstack.com: https://patchstack.com/database/wordpress/plugin/nextend-smart-slider3-pro/vulnerability/wordpress-smart-slider-3-plugin-3-5-1-35-backdoor-vulnerability patchstack.com: https://patchstack.com/articles/critical-supply-chain-compromise-in-smart-slider-3-pro-full-malware-analysis/ mysites.guru: https://mysites.guru/blog/smart-slider-3-pro-supply-chain-compromise/