CVE-2026-115820 in Majestic Support Plugin
Summary
by MITRE • 10/30/2026
The Majestic Support – The Leading-Edge Help Desk & Customer Support Plugin plugin for WordPress is vulnerable to generic SQL Injection via the 'columns (array keys)' parameter in all versions up to, and including, 1.2.2 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with subscriber-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. Any authenticated WordPress user with Subscriber-level access can exploit this because the 'saveusereraserequest' task is whitelisted for front-end customer use, the plugin auto-provisions a help-desk record for every WordPress account, and the only guard is a nonce the attacker legitimately obtains from their own 'Add erase request' page.
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Analysis
by VulDB Data Team • 10/30/2026
The Majestic Support – The Leading-Edge Help Desk & Customer Support Plugin for WordPress contains a critical SQL injection vulnerability affecting all versions up to 1.2.2. This flaw stems from insufficient input validation and the absence of parameterized queries when processing user-supplied data, specifically within the columns array keys parameter used during database operations. The core technical failure lies in the direct concatenation or interpolation of unsanitized user input into SQL statements without proper escaping or preparation mechanisms. This architectural deficiency allows malicious actors to manipulate the structure of backend database commands by injecting arbitrary SQL syntax through legitimate-looking request parameters, thereby bypassing standard application logic controls that would otherwise restrict data access.
The operational impact of this vulnerability is severe due to its low barrier for exploitation and high potential for data exfiltration. Unlike many remote code execution or privilege escalation flaws that require administrative privileges, this specific weakness can be exploited by any authenticated WordPress user holding at least Subscriber-level access. The plugin’s design philosophy includes auto-provisioning a help-desk record for every registered WordPress account to facilitate customer support interactions. Consequently, the attack surface is significantly expanded because virtually all users on a compromised site possess valid credentials and active sessions capable of triggering the vulnerable code path. Furthermore, the specific function involved in this vulnerability, saveusereraserequest, is whitelisted for front-end customer use, meaning it does not require backend administrative access to execute.
Exploitation relies on the attacker obtaining a legitimate nonce from their own Add erase request page within the WordPress dashboard or frontend interface. While nonces are typically employed as anti-CSRF tokens to prevent unauthorized state-changing requests, in this context they serve only as an authentication gate rather than a robust security control against injection attacks. Once the attacker possesses a valid nonce and authenticated session, they can craft HTTP requests containing maliciously formatted columns array keys that append additional SQL queries to existing database operations. This capability enables the extraction of sensitive information from the WordPress database, including user credentials, personal identifiable information stored in help desk records, site configuration details, and potentially other plugins' data if table prefixes are predictable or disclosed through error messages.
This vulnerability aligns with CWE-89 Improper Neutralization of Special Elements used in an SQL Command commonly known as SQL Injection. The lack of prepared statements represents a fundamental deviation from secure coding standards recommended by organizations such as OWASP and the SANS Institute. In terms of adversary behavior, this exploitation technique corresponds to ATT&CK tactic T1059 Command and Scripting Interpreter with sub-techniques related to database interaction, specifically aiming at data exfiltration via SQL injection which falls under the broader category of Collection or Impact depending on whether data is stolen or altered. The ability for low-privileged users to perform such actions highlights a critical flaw in privilege separation within the plugin’s architecture, where functional requirements for customer support inadvertently create pathways for database compromise without requiring elevated permissions.
Mitigation strategies must prioritize immediate patching and architectural review. Site administrators should upgrade the Majestic Support plugin to version 1.2.3 or later as soon as possible, ensuring that developers have implemented proper parameterized queries using prepared statements with bound parameters rather than string concatenation for all database interactions involving user input. In addition to updating software, organizations should enforce strict least-privilege principles by reviewing which capabilities are assigned to subscriber-level accounts and considering whether front-end access is strictly necessary for all users or if it can be restricted based on specific support ticket statuses. Implementing a Web Application Firewall with rules specifically tuned to detect SQL injection patterns in POST parameters related to help desk functions can provide an additional layer of defense during the transition period before patching occurs. Regular security audits and code reviews focusing on database query construction practices are essential to prevent similar vulnerabilities from being introduced into WordPress plugins or custom themes, ensuring that input sanitization is applied consistently across all user-facing endpoints regardless of their perceived risk level.