Crocoblock JetEngine: SQL injection in WordPress plugin
Summary
The WordPress plugin JetEngine by Crocoblock, up to and including version 3.9.0.1, contains an SQL injection vulnerability (CWE-89, CVE-2026-39736). An attacker with a low-privileged account, which Patchstack lists as Contributor, can send crafted input to read, modify or delete database content, including user data. The CVSS score is 8.5 according to the CNA, but NVD analysis is pending and the sources disagree on the score.
Affected
- JetEngine WordPress plugin by Crocoblock, versions up to and including 3.9.0.1 (CNA record: from n/a through 3.9.0.1)
Fixed in
- 3.9.0.2 or later (stated by the CNA record and Patchstack; not yet confirmed against a Crocoblock changelog)
Workaround
- Unknown. No vendor workaround found.
- Patchstack advises updating the plugin; if that is not possible, ask the hosting provider or web developer for help.
- Take a backup and deactivate JetEngine on sites where it is not needed.
Exploitation
- No public exploit reported by VulDB.
- Not known to be exploited according to OffSeq. CISA KEV status not verified.
- CISA SSVC: exploitation none, automatable no, technical impact partial.
- EPSS: 0.31 %.
Our recommendation
- Update JetEngine to 3.9.0.2 or later on all WordPress sites.
- Prioritise sites with user registration or many low-privilege accounts.
- Review accounts with Contributor or similar roles.
- Confirm the fixed version in the Crocoblock changelog before closing the ticket.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Patchstack: WordPress JetEngine plugin <= 3.9.0.1 SQL Injection patchstack.com
- VulDB: CVE-2026-39736 (vuln 428430) vuldb.com
- OffSeq Radar: CVE-2026-39736 radar.offseq.com
- Strix: CVE-2026-39736 www.strix.ai
- Patchstack: WordPress JetEngine plugin 3.9.0 SQL Injection (related variant) patchstack.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 1 Nov 2026, 09:48.
Original description (NVD)
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in Crocoblock JetEngine jet-engine allows SQL Injection.This issue affects JetEngine: from n/a through 3.9.0.1.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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