Smart Slider 3 Pro 3.5.1.35 Supply Chain Attack Remote Access Toolkit

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-34424
StatePUBLISHED
AssignerVulnCheck
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-09 23:17:00 UTC
Updated2026-04-09 23:17:00 UTC
DescriptionSmart 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.

Risk And Classification

Primary CVSS: v4.0 9.3 CRITICAL from [email protected]

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

EPSS: 0.001520000 probability, percentile 0.359820000 (date 2026-04-10)

Problem Types: CWE-506 | CWE-506 CWE-506 Embedded Malicious Code

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary9.3CRITICALCVSS: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/C...
4.0CNACVSS9.3CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
3.1[email protected]Primary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNACVSS9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

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

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Nextendweb Smart Slider 3 Pro For WordPress affected 3.5.1.35 semver Not specified
CNA Nextendweb Smart Slider 3 Pro For WordPress unaffected 3.5.1.34 semver Not specified
CNA Nextendweb Smart Slider 3 Pro For WordPress unaffected 3.5.1.36 semver Not specified
CNA Nextendweb Smart Slider 3 Pro For Joomla affected 3.5.1.35 semver Not specified
CNA Nextendweb Smart Slider 3 Pro For Joomla unaffected 3.5.1.34 semver Not specified
CNA Nextendweb Smart Slider 3 Pro For Joomla unaffected 3.5.1.36 semver Not specified

References

ReferenceSourceLinkTags
patchstack.com/database/wordpress/plugin/nextend-smart-slider3-pro/vulnerabi... [email protected] patchstack.com
smartslider.helpscoutdocs.com/article/2143-joomla-security-advisory-smart-slider-3-pro-3-5-... [email protected] smartslider.helpscoutdocs.com
mysites.guru/blog/smart-slider-3-pro-supply-chain-compromise [email protected] mysites.guru
smartslider.helpscoutdocs.com/article/2144-wordpress-security-advisory-smart-slider-3-pro-3... [email protected] smartslider.helpscoutdocs.com
patchstack.com/articles/critical-supply-chain-compromise-in-smart-slider-3-p... [email protected] patchstack.com
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