CVE-2026-42416 in UDesign Core Plugin
Summary
by MITRE • 10/06/2026
Subscriber SQL Injection in UDesign Core <= 4.15.0 versions.
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Analysis
by VulDB Data Team • 10/06/2026
The vulnerability identified as a Subscriber SQL Injection within the UDesign Core plugin, affecting versions up to and including 4.15.0, represents a critical security flaw that compromises the integrity of backend database operations through maliciously crafted input parameters. This specific type of injection arises from insufficient sanitization or validation of user-supplied data before it is incorporated into SQL queries executed by the application. In this context, the vulnerability likely stems from endpoints or administrative functions related to subscriber management where inputs such as email addresses, names, or subscription statuses are passed directly into database statements without proper escaping mechanisms. An attacker can exploit this weakness by injecting arbitrary Structured Query Language code through these input fields, thereby manipulating the intended query structure and forcing the database engine to execute unintended commands.
From a technical perspective, this flaw aligns with CWE-89, which classifies Improper Neutralization of Special Elements used in an SQL Command, commonly known as SQL Injection. The root cause typically involves the concatenation of user input directly into SQL strings rather than using parameterized queries or prepared statements. This allows attackers to bypass authentication mechanisms, extract sensitive data from other database tables, modify existing records, or even drop critical tables depending on the privileges granted to the database account used by the web application. The exploitation vector is generally remote and requires no prior authentication if the vulnerable endpoint is publicly accessible, although it may also be triggered by authenticated users with lower-level permissions who have access to subscriber management features.
The operational impact of this vulnerability extends beyond simple data leakage. Successful exploitation can lead to a complete compromise of the underlying web server environment through advanced techniques such as out-of-band network interactions or time-based blind injection methods that allow attackers to infer database structure and content without direct output display. Furthermore, if the database user has elevated privileges, an attacker could potentially write files to the file system or execute operating system commands via specific SQL functions like LOAD_FILE or INTO OUTFILE in MySQL environments. This significantly increases the risk of full site takeover, defacement, and unauthorized access to sensitive customer information including personal identifiable information stored within subscriber records.
In terms of threat modeling, this vulnerability maps to MITRE ATT&CK techniques such as T1059 Command and Scripting Interpreter if command execution is achieved through SQL injection, or more commonly T1190 Exploit Public-Facing Application for initial access and data exfiltration via T1005 Data from Local System. The attack pattern involves crafting specific payloads that exploit the lack of input validation to manipulate database behavior, often utilizing UNION-based attacks to retrieve data from multiple tables simultaneously or error-based techniques to extract version information and schema details.
Mitigation strategies must prioritize immediate remediation through software updates. Administrators should upgrade UDesign Core to a version later than 4.15.0 where the developers have presumably implemented proper input validation, output encoding, and parameterized query practices to neutralize injection attempts. In cases where an update is not immediately feasible, temporary mitigations include implementing Web Application Firewall rules that detect common SQL injection patterns in HTTP requests targeting subscriber-related endpoints. Additionally, enforcing strict database permissions by adhering to the principle of least privilege ensures that even if exploitation occurs, the attacker cannot perform destructive actions such as dropping tables or accessing unrelated sensitive data stores. Regular security audits and code reviews focusing on all user input handling mechanisms are essential to prevent similar vulnerabilities from persisting in other parts of the application ecosystem.