CVE-2026-62059 in Ultimate Member Plugin
Summary
by MITRE • 10/01/2026
Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in Ultimate Member Ultimate Member ultimate-member allows Blind SQL Injection.This issue affects Ultimate Member: from n/a through 2.13.1.
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Analysis
by VulDB Data Team • 10/01/2026
The identified security flaw represents a classic instance of Improper Neutralization of Special Elements used in an SQL Command, commonly categorized under CWE-89 within the Common Weakness Enumeration framework. This vulnerability exists within the Ultimate Member plugin for WordPress, specifically affecting versions ranging from its initial release through version 2.13.1. The core technical issue stems from insufficient input validation and sanitization mechanisms when processing user-supplied data that is subsequently incorporated into database queries without proper escaping or parameterization. As a result, an attacker can inject malicious SQL statements into the application logic, exploiting the trust relationship between the web server and the backend database management system.
The specific nature of this vulnerability is characterized as Blind SQL Injection, which distinguishes it from standard injection attacks that return error messages or direct data output to the user interface. In a blind scenario, the attacker cannot directly see the results of their injected queries on the screen. Instead, they must infer information based on the application's behavior, such as response times, HTTP status codes, or boolean-based differences in page content. This method requires more sophisticated exploitation techniques and often involves automated tools to systematically extract data by sending a series of crafted requests that trigger conditional logic within the database layer. The lack of immediate feedback makes detection during standard penetration testing slightly more challenging but does not diminish the severity of the potential data exfiltration.
From an operational impact perspective, successful exploitation allows unauthorized actors to bypass authentication mechanisms, escalate privileges, or extract sensitive information stored in the WordPress database. This may include user credentials, personal identifiable information associated with member profiles, administrative settings, and potentially other site-specific data depending on the plugin's integration depth within the broader application architecture. The ability to manipulate SQL commands effectively grants the attacker control over the underlying data structure, which can lead to complete compromise of the web application if combined with other vulnerabilities or misconfigurations in the hosting environment.
This vulnerability aligns closely with MITRE ATT&CK technique T1059, specifically sub-technique 004 for Command and Scripting Interpreter: SQL Commands, as it involves the injection of executable code into a database engine via an application interface. The attack vector is typically classified as Remote Code Execution through Input Manipulation, where the entry point is accessible over the network without requiring prior authentication in many cases involving blind injections targeting public-facing forms or endpoints within the plugin's functionality.
Mitigation strategies must prioritize immediate remediation by upgrading Ultimate Member to a version later than 2.13.1, as this update presumably includes patches for input sanitization and query parameterization. In scenarios where an upgrade is not immediately feasible due to compatibility constraints with other plugins or custom code modifications, administrators should implement Web Application Firewall rules designed to detect and block common SQL injection patterns in HTTP requests targeting the plugin's endpoints. Additionally, enforcing strict principle of least privilege on database accounts used by WordPress can limit the damage if exploitation occurs, ensuring that the application user does not have administrative rights within the database itself. Regular security audits and code reviews focusing on data handling practices are essential to prevent similar flaws from being introduced in future updates or custom developments.