CVE-2026-19049 in ProSolution WP Client Plugin
Summary
by MITRE • 08/10/2026
The ProSolution WP Client WordPress plugin before 2.0.9 does not sanitise a cookie value before using it in SQL queries, and processes that cookie on every request without any authentication or capability check, allowing unauthenticated users to read arbitrary data from the database and to delete the records the ProSolution WP Client WordPress plugin before 2.0.9 stores.
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Analysis
by VulDB Data Team • 08/10/2026
The ProSolution WP Client WordPress plugin versions prior to 2.0.9 contain a critical SQL injection vulnerability that stems from inadequate input sanitisation of cookie values within database operations. This flaw exists in the plugin's handling of user-provided data through HTTP cookies without proper validation or authentication mechanisms. The vulnerability manifests when the plugin processes cookie values during every request cycle, regardless of user authentication status, creating an attack surface that allows unauthenticated remote exploitation. The lack of capability checks means that any visitor to the WordPress site can potentially leverage this weakness to execute malicious database operations.
The technical implementation of this vulnerability demonstrates poor security practices in data handling and access control. When the plugin reads cookie values and incorporates them directly into SQL queries without sanitisation, it creates an environment where malicious actors can inject arbitrary SQL commands through crafted cookie content. This represents a classic SQL injection attack vector that violates fundamental security principles outlined in CWE-89, which specifically addresses improper neutralization of special elements used in SQL commands. The vulnerability's impact extends beyond simple data retrieval to include destructive operations such as record deletion, making it particularly dangerous for database integrity.
The operational implications of this vulnerability are severe for WordPress installations using the affected plugin version. Attackers can exploit this weakness to extract sensitive information from the database including user credentials, configuration settings, and other stored data that the ProSolution WP Client plugin manages. The unauthenticated nature of the attack means that no prior access or credentials are required to perform these operations, significantly lowering the barrier to exploitation. This vulnerability directly conflicts with the principle of least privilege as defined in cybersecurity best practices, where systems should only grant access based on verified authentication and appropriate authorization levels.
Mitigation strategies for this vulnerability require immediate action including updating to ProSolution WP Client version 2.0.9 or later, which contains the necessary sanitisation fixes. Additionally, administrators should implement network-level protections such as web application firewalls that can detect and block suspicious cookie content patterns. The remediation process must include thorough review of all plugin components for similar input handling issues and implementation of proper parameterised queries to prevent future SQL injection vulnerabilities. Organizations should also consider implementing database activity monitoring to detect unusual query patterns that might indicate exploitation attempts, aligning with defensive techniques described in the MITRE ATT&CK framework under the database persistence and credential access tactics.