CVE-2026-34424: Nextendweb Smart Slider 3 Pro for WordPress

Smart Slider 3 Pro 3.5.1.35 Supply Chain Attack Remote Access Toolkit

CVSS 9.3 CriticalCriticalEPSS 0.0056 · 46th percentile

Critical, because:

CVSS score 9.3: 9.0 or more.

Published by the CVE Program (CNA: VulnCheck) at 9 Apr 2026, 22:59 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Nextendweb	Smart Slider 3 Pro for WordPress	affected 3.5.1.35 custom unaffected 3.5.1.34 and earlier custom unaffected 3.5.1.36 custom Other versions: unaffected
Nextendweb	Smart Slider 3 Pro for Joomla	affected 3.5.1.35 custom unaffected 3.5.1.34 and earlier custom unaffected 3.5.1.36 custom Other versions: unaffected

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
9.3	Critical	4.0	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	CNA (VulnCheck)Used for this record
9.8	Critical	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0056, the 46th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 9 Apr 2026. New records show when each source confirmed them.

Sources

References from the CNA

smartslider.helpscoutdocs.com/article/2144-wordpress-security-advisory-smart-slider-3-pro-3-5-1-35-compromise vendor-advisorypatch
smartslider.helpscoutdocs.com/article/2143-joomla-security-advisory-smart-slider-3-pro-3-5-1-35-compromise vendor-advisorypatch
patchstack.com/database/wordpress/plugin/nextend-smart-slider3-pro/vulnerability/wordpress-smart-slider-3-plugin-3-5-1-35-backdoor-vulnerability third-party-advisory
patchstack.com/articles/critical-supply-chain-compromise-in-smart-slider-3-pro-full-malware-analysis/ technical-description
mysites.guru/blog/smart-slider-3-pro-supply-chain-compromise/ technical-description

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.