CVE-2022-2559 in Fluent Support Plugin
Summary
by MITRE • 08/29/2022
The Fluent Support WordPress plugin before 1.5.8 does not properly sanitise, validate and escape various parameters before using them in an SQL statement, leading to an SQL Injection vulnerability exploitable by high privilege users
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Analysis
by VulDB Data Team • 10/09/2022
The Fluent Support WordPress plugin vulnerability identified as CVE-2022-2559 represents a critical security flaw that undermines the integrity of WordPress installations relying on this support management solution. This vulnerability exists within the plugin's handling of user-supplied data in SQL operations, creating an avenue for malicious actors to manipulate database queries. The issue affects versions prior to 1.5.8, indicating that the developers had not yet implemented proper safeguards against parameter manipulation in their database interaction code. The vulnerability specifically targets the plugin's failure to adequately sanitize, validate, and escape input parameters before incorporating them into SQL statements, which constitutes a fundamental breakdown in secure coding practices.
The technical implementation of this vulnerability stems from improper input handling within the plugin's database operations, where user-provided parameters are directly concatenated into SQL queries without sufficient sanitization. This flaw aligns with CWE-89 which classifies improper neutralization of special elements used in an SQL command as a critical weakness in application security. Attackers with high privilege user accounts can exploit this vulnerability to execute arbitrary SQL commands against the WordPress database, potentially gaining unauthorized access to sensitive information, modifying or deleting critical data, or even escalating their privileges within the system. The requirement for high privilege users to exploit this vulnerability does not diminish its severity, as such accounts are often compromised through other means or represent valuable targets for attackers seeking persistent access to systems.
The operational impact of this vulnerability extends beyond simple data compromise, as it can enable attackers to manipulate the support ticketing system's functionality entirely. Successful exploitation could allow malicious actors to view confidential customer information, modify support ticket records, inject malicious code into the system, or potentially use the compromised plugin as a foothold for broader attacks against the WordPress installation. The vulnerability's presence in a support plugin particularly concerning, as it may contain sensitive customer data, system configuration information, and communication records that could be leveraged for further attacks. This type of vulnerability also aligns with ATT&CK technique T1078 which covers valid accounts as a means of gaining access to systems, since the exploitation requires elevated privileges that attackers might obtain through other attack vectors.
Organizations utilizing the Fluent Support plugin must prioritize immediate remediation by updating to version 1.5.8 or later, which incorporates proper input sanitization and validation mechanisms. The mitigation strategy should include comprehensive security auditing of all active WordPress plugins to identify similar vulnerabilities in the codebase. Additionally, implementing proper database access controls, regular security scanning, and maintaining up-to-date security practices can help prevent exploitation of such vulnerabilities. The incident underscores the importance of input validation and parameterized queries in preventing SQL injection attacks, which should be considered fundamental security requirements in all database-driven applications. Security teams should also implement monitoring solutions to detect unusual database query patterns that might indicate exploitation attempts, while maintaining regular patch management procedures to ensure all WordPress components remain protected against known vulnerabilities.