Vulnerability Description
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.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://mysites.guru/blog/smart-slider-3-pro-supply-chain-compromise/
- https://patchstack.com/articles/critical-supply-chain-compromise-in-smart-slider
- https://patchstack.com/database/wordpress/plugin/nextend-smart-slider3-pro/vulne
- https://smartslider.helpscoutdocs.com/article/2143-joomla-security-advisory-smar
- https://smartslider.helpscoutdocs.com/article/2144-wordpress-security-advisory-s
FAQ
What is CVE-2026-34424?
CVE-2026-34424 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 ...
How severe is CVE-2026-34424?
CVE-2026-34424 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-34424?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.