WordPress plugin
Smart Slider 3 Pro 3.5.1.35 — Backdoor Embedded via Supply Chain Compromise
d7261e93-2341-4e14-a9b3-8fec295f6cdePublished · Updated Action summary
Affected: 3.5.1.35 – 3.5.1.35Update to 3.5.1.36 or newer
All remediation steps- Severity
- Critical9.8
- CVSS
- 9.8CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:HConfidentiality- High
I:HIntegrity- High
A:HAvailability- High
- Weakness
- CWE-506 Embedded Malicious Code
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page7
Am I affected?
Smart Slider 3 Pro nextend-smart-slider3-pro
- Affected3.5.1.35 – 3.5.1.35
- Patched in3.5.1.36
Update to 3.5.1.36 or newer.
You are affected if you run 3.5.1.35 – 3.5.1.35. Version 3.5.1.36 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Smart Slider 3 Pro.
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- Update to version 3.5.1.36, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Smart Slider 3 Pro to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence.
The Smart Slider 3 Pro plugin for WordPress contains a malicious backdoor in version 3.5.1.35. This is due to a supply chain compromise that resulted in malicious copies of Smart Slider 3 Pro being installed on sites. This makes it possible for unauthenticated attackers to gain root access to a compromised site.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Timeline
CVE published
Severity critical, CVSS 9.8
Record last updated
Sources & licenses
- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.