CVE-2026-105317 in Paid Member Subscriptions Plugin
Summary
by MITRE • 10/06/2026
Subscriber SQL Injection in Paid Member Subscriptions <= 3.1.1 versions.
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Analysis
by VulDB Data Team • 10/06/2026
The vulnerability identified as CVE-2024-XXXXX affects the Paid Member Subscriptions plugin for WordPress, specifically impacting all versions up to and including 3.1.1. This security flaw is classified under CWE-89, which denotes Improper Neutralization of Special Elements used in an SQL Command, commonly known as SQL Injection. The vulnerability resides within a functionality that handles subscriber data processing, allowing unauthenticated attackers or low-privileged users to inject malicious SQL statements into the application's database queries. This type of flaw typically arises when user-supplied input is concatenated directly into SQL commands without adequate sanitization or parameterized query preparation, thereby bypassing intended security controls and granting the attacker direct access to the underlying database structure.
From a technical perspective, the exploitation vector likely involves manipulating specific HTTP parameters related to subscriber profile updates, subscription management actions, or data export features within the plugin's administrative interface or public-facing forms. By crafting specially crafted input strings containing SQL syntax such as UNION SELECT statements or boolean-based blind injection techniques, an attacker can manipulate the query logic executed by the backend database server. This manipulation allows the extraction of sensitive information stored in the WordPress database, including user credentials with hashed passwords, personal identifiable information (PII) of subscribers, and potentially administrative session tokens if cookie handling is also compromised due to subsequent code execution paths. The lack of proper input validation on subscriber-related endpoints creates a direct pathway for data exfiltration or database modification.
The operational impact of this vulnerability is severe, particularly given the sensitive nature of subscription-based platforms that handle financial transactions and personal user data. Successful exploitation can lead to full compromise of the WordPress installation if combined with other vulnerabilities such as file upload flaws or if the database server has elevated privileges allowing OS command execution via functions like INTO OUTFILE in MySQL/MariaDB environments. Beyond immediate data theft, attackers may use this access to deface websites, install webshells for persistent backdoor access, or disrupt service availability by corrupting critical tables. For businesses relying on recurring revenue models, such a breach results in significant reputational damage, regulatory penalties under frameworks like GDPR or CCPA due to the exposure of subscriber PII, and potential loss of customer trust.
Mitigation strategies must be implemented immediately to address this risk. The primary remediation is to upgrade the Paid Member Subscriptions plugin to version 3.1.2 or later, where the developers have presumably patched the input validation logic and enforced parameterized queries for all database interactions involving subscriber data. In cases where immediate upgrading is not feasible due to compatibility constraints with other site plugins, temporary mitigations include implementing a Web Application Firewall (WAF) rule set designed to detect and block SQL injection patterns in HTTP requests targeting WordPress endpoints associated with the plugin. Additionally, administrators should enforce strict least-privilege principles for database users assigned to the WordPress application, ensuring that the database account does not have FILE or SUPER privileges which could exacerbate the impact of a successful SQL injection attack. Regular security audits and penetration testing are recommended to verify the effectiveness of these controls and identify any residual risks in custom code integrations with the plugin.