WordPress security changelog
CRITICAL CVE-2026-34424 Deferred

Smart Slider 3 Pro for WordPress, Smart Slider 3 Pro for Joomla: A security weakness

Smart Slider 3 Pro for WordPress, Smart Slider 3 Pro for Joomla is affected by a security weakness. The vulnerable path is reachable without authentication. The resulting impact depends on how the affected component exposes the vulnerable operation. The published affected range is 3.5.1.35.

CVE / CNA score 9.3 CVSS 4.0 · disclosure@vulncheck.com
NVD score Pending NVD has not published its own CVSS assessment.
Component
Smart Slider 3 Pro for WordPress, Smart Slider 3 Pro for Joomla
Plugin slug
nextend-smart-slider3-pro
Affected
3.5.1.35
Safe version
3.5.1.36
Published
Apr 09, 2026
Weakness
CWE-506 — Embedded Malicious Code

This CVE was published Apr 09, 2026 and is one of 1 known issue for this plugin.

What to do

Update, patch or deactivate.

Update Smart Slider 3 Pro for WordPress, Smart Slider 3 Pro for Joomla to 3.5.1.36 or later, or disable and remove it until a fixed version is available.

A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical 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.

CVE / CNA vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

References

Primary and upstream sources