CVE-2026-115224 in Customer Engagement System Plugin
Summary
by MITRE • 10/28/2026
The Customer Engagement System WordPress plugin before 2.0.2 does not safely build the SQL statements that store a popup's page and category visibility rules, concatenating request-supplied ID values directly into an INSERT statement with no parameter binding or integer cast, allowing an authenticated administrator to inject arbitrary SQL and read the contents of the WordPress database.
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Analysis
by VulDB Data Team • 10/28/2026
The vulnerability identified in versions of the Customer Engagement System plugin prior to 2.0.2 represents a critical failure in input validation and query construction within the WordPress ecosystem. This flaw specifically affects the mechanism used to store visibility rules for popups, which determine on which pages or categories a popup should be displayed. The core technical deficiency lies in how the application constructs SQL INSERT statements when saving these configuration settings. Instead of utilizing prepared statements with parameter binding or enforcing strict integer casting on user-supplied identifiers, the software directly concatenates request parameters into the SQL query string. This architectural oversight creates a classic injection vector that undermines the integrity and confidentiality of the underlying database infrastructure.
From an operational perspective, this vulnerability allows for authenticated privilege escalation attacks targeting the database layer. Although the attack requires administrative privileges to trigger initially, the impact is severe because it grants the attacker direct read access to the entire WordPress database contents. An adversary with administrator-level credentials can exploit this flaw by crafting malicious HTTP requests that contain specially crafted SQL payloads within the ID fields associated with popup visibility rules. By injecting arbitrary SQL code through these parameters, an attacker can manipulate the query structure to extract sensitive data such as user passwords, session tokens, configuration details, and other proprietary information stored in the database tables. This capability effectively bypasses standard application-level access controls by interacting directly with the database engine.
The technical classification of this flaw aligns closely with CWE-89, which defines Improper Neutralization of Special Elements used in an SQL Command, commonly known as SQL Injection. The specific nature of this vulnerability involves a blind or error-based injection technique depending on how the application handles query errors and response feedback. Furthermore, within the context of the MITRE ATT&CK framework for enterprise security, this behavior corresponds to techniques involving Data from Information Repositories under the Collection tactic. Specifically, it facilitates unauthorized access to stored data through exploitation of software vulnerabilities rather than direct credential theft or network sniffing. The lack of parameterized queries means that any input provided by an authenticated user is treated as executable code rather than literal data, which is a fundamental violation of secure coding principles mandated by standards such as OWASP Top Ten and CWE-20 Improper Input Validation.
Mitigation strategies for this vulnerability are straightforward but require immediate action from system administrators and plugin developers. The primary remediation involves upgrading the Customer Engagement System plugin to version 2.0.2 or later, where the developer has presumably implemented proper input sanitization and prepared statement usage. For organizations unable to upgrade immediately due to compatibility constraints, temporary mitigations include restricting administrative access through IP whitelisting if possible, implementing Web Application Firewall rules that detect SQL injection patterns in POST requests targeting plugin endpoints, and auditing database logs for anomalous query structures. Additionally, developers should review all other instances of direct string concatenation in SQL queries within the codebase to ensure comprehensive remediation against similar flaws. Regular security audits and adherence to secure coding standards are essential to prevent recurrence of such structural weaknesses in future software updates.