CVE-2026-93300 in EventON Plugin
Summary
by MITRE • 10/20/2026
The EventON - Subscriber plugin for WordPress is vulnerable to generic SQL Injection via the 'email' parameter in all versions up to, and including, 1.4.5 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.
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Analysis
by VulDB Data Team • 10/20/2026
The EventON - Subscriber plugin, a widely utilized extension for WordPress content management systems designed to manage subscriber lists and event registrations, contains a critical security flaw in versions up through 1.4.5. This vulnerability manifests as an unauthenticated generic SQL injection vector located within the email parameter processing logic. The root cause of this issue lies in insufficient input sanitization and validation mechanisms employed by the plugin developers. Specifically, user-supplied data passed via the email field is not adequately escaped before being incorporated into database queries. Furthermore, the application fails to utilize prepared statements or parameterized queries, which are industry-standard practices for preventing SQL injection attacks. This architectural oversight allows malicious actors to manipulate the structure of SQL commands executed against the backend database server.
From a technical perspective, this flaw aligns with CWE-89, commonly known as Improper Neutralization of Special Elements used in an SQL Command. The vulnerability permits unauthenticated attackers to inject arbitrary SQL code into the application's query flow. By appending additional SQL statements or modifying existing ones through specially crafted input payloads, an attacker can bypass intended logic and execute commands that were not originally planned by the software developers. This capability effectively grants the attacker control over how data is retrieved from or manipulated within the database associated with the WordPress installation. The lack of authentication requirements for this vector significantly lowers the barrier to entry for exploitation, making it accessible to a broad range of threat actors who may possess only basic knowledge of SQL injection techniques and automated scanning tools.
The operational impact of exploiting this vulnerability can be severe, potentially leading to full database compromise. An attacker could extract sensitive information such as user credentials, personal identifiable information stored in subscriber records, administrative session tokens, or other confidential data housed within the WordPress database. In many configurations, if the web server process has elevated privileges on the database, the impact extends beyond mere data exfiltration. The attacker might be able to modify existing records, delete critical tables, or even execute operating system commands depending on the specific database engine and its configuration settings. This level of access can result in complete site defacement, persistent backdoors being installed for future unauthorized access, and significant reputational damage due to data breaches affecting subscribers and users who trust the platform with their information.
This vulnerability is also closely associated with MITRE ATT&CK technique T1059, specifically Command and Scripting Interpreter sub-techniques involving SQL commands, as well as T1213 Data from Information Repositories for unauthorized data access. The exploitation path typically involves sending crafted HTTP requests to the vulnerable endpoint containing maliciously formatted email addresses designed to break out of string literals within the SQL query structure. Once executed, these injected queries run with the same privileges as the web application itself, allowing the attacker to interact directly with the database management system without needing valid user credentials for the WordPress admin panel or other authenticated areas of the site.
To mitigate this vulnerability, immediate action is required by administrators running affected versions of the EventON - Subscriber plugin. The primary and most effective remediation step is to upgrade the plugin to version 1.4.6 or later, where these input validation and query preparation issues have been addressed by the developers. Until an update can be applied, temporary mitigations should include implementing a Web Application Firewall that filters out common SQL injection patterns in HTTP requests targeting the specific endpoints associated with subscriber management features. Additionally, administrators should ensure that database user accounts used by WordPress operate under the principle of least privilege, restricting permissions to only those necessary for normal operation and preventing access to sensitive system tables or operating system commands. Regular security audits and code reviews focusing on input handling practices are also recommended to prevent similar flaws in future updates or other plugins within the ecosystem.