CVE-2026-34424

Smart Slider 3 Pro 3.5.1.35 Supply Chain Attack Remote Access Toolkit

Published Apr 9, 2026 CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Wordpress
Wordpress wordpress
Vendors & Products Wordpress
Wordpress wordpress
Type Values Removed Values Added
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.
Title Smart Slider 3 Pro 3.5.1.35 Supply Chain Attack Remote Access Toolkit
First Time appeared Nextendweb
Nextendweb smart Slider 3
Weaknesses CWE-506
CPEs cpe:2.3:a:nextendweb:smart_slider_3:3.5.1.35:*:*:*:*:joomla:*:*
cpe:2.3:a:nextendweb:smart_slider_3:3.5.1.35:*:*:*:*:wordpress:*:*
Vendors & Products Nextendweb
Nextendweb smart Slider 3
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
May 14, 2026, 4:05 PM
Reserved
Mar 27, 2026, 3:24 PM
Status
Deferred
Published
Apr 9, 2026, 11:17 PM
Modified
Jun 17, 2026, 10:39 AM