CVE-2026-39736 in JetEngine Plugin
Summary
by MITRE • 10/29/2026
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.
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Analysis
by VulDB Data Team • 10/29/2026
The identified security flaw represents a classic instance of Improper Neutralization of Special Elements used in an SQL Command, commonly referred to as SQL Injection. This vulnerability resides within the Crocoblock JetEngine plugin for WordPress, specifically affecting versions ranging from its initial release through version 3.9.0.1. The core technical deficiency lies in the application's failure to adequately sanitize or validate user-supplied input before incorporating it into backend database queries. In a typical web architecture utilizing this framework, dynamic content is often generated based on parameters passed by users via HTTP requests. When these inputs are directly concatenated into SQL statements without proper escaping mechanisms such as prepared statements or parameterized queries, an attacker can manipulate the structure of the query itself rather than just its data payload.
From a technical perspective, the exploitation vector likely involves injecting malicious SQL syntax through form fields, URL parameters, or AJAX requests that interact with JetEngine's dynamic listing and post elements features. By carefully crafting input strings containing characters such as single quotes, semicolons, and comment markers like -- or /*, an attacker can break out of the intended query context. This allows for arbitrary command execution against the underlying database management system. The severity of this flaw is compounded by its potential to facilitate both blind and error-based SQL injection attacks, where the application's response behavior reveals information about the database structure even without direct output display on the frontend interface.
The operational impact of successfully exploiting this vulnerability can be catastrophic for website administrators and their users. An attacker with sufficient privileges or access to the vulnerable endpoint could extract sensitive data stored in the WordPress database, including user credentials, personal identifiable information, and administrative session tokens. Beyond data exfiltration, the vulnerability may allow for unauthorized modification or deletion of content, effectively compromising the integrity of the entire website. In severe cases, if the underlying database server is configured with excessive privileges, an attacker might leverage SQL injection to execute operating system commands on the host machine, leading to a complete compromise of the web server infrastructure and potential lateral movement within the network environment.
This vulnerability aligns closely with CWE-89, which categorizes improper neutralization of special elements in SQL commands as a critical input validation failure. Furthermore, from an offensive security perspective, this flaw maps directly to MITRE ATT&CK technique T1059, specifically sub-techniques related to command and script interpreters or database query injection such as T1190 if it leads to initial access via web application attacks. The lack of input sanitization violates fundamental secure coding principles that mandate the separation of code and data during execution contexts.
To mitigate this risk, immediate action is required by upgrading JetEngine to a version later than 3.9.0.1 where these specific injection points have been patched with proper parameterized queries or robust escaping functions provided by the WordPress database API such as $wpdb->prepare(). Administrators should also implement Web Application Firewalls that can detect and block common SQL injection patterns in HTTP traffic, providing a layer of defense-in-depth while patches are applied. Additionally, enforcing strict input validation on all user-facing forms and ensuring that database accounts used by the web application adhere to the principle of least privilege will significantly reduce the blast radius should an exploitation attempt occur. Regular security audits and code reviews focusing on dynamic query construction practices are essential for maintaining long-term resilience against such injection-based threats.