CVE-2025-39587 is a security vulnerability classified as an SQL Injection in the Stylemix Cost Calculator Builder plugin, a WordPress plugin used to create cost calculators on websites. The vulnerability stems from improper neutralization of special characters in SQL commands, which allows an attacker to inject malicious SQL code. This can lead to unauthorized database queries, enabling attackers to read, modify, or delete sensitive data stored in the backend database. The affected versions include all releases up to and including 3.2.65. The vulnerability was publicly disclosed on April 17, 2025, with no CVSS score assigned yet and no known exploits in the wild. SQL Injection vulnerabilities are critical because they can compromise the confidentiality, integrity, and availability of data. Exploitation typically requires the attacker to send crafted requests to the vulnerable plugin's interface, which does not require user interaction but may require the plugin to be active on the target site. The lack of a patch link indicates that a fix may not yet be available, increasing the urgency for mitigation. Given the plugin’s usage in WordPress environments, this vulnerability could affect a broad range of websites, especially those handling sensitive customer or financial data.

The potential impact of CVE-2025-39587 is significant for organizations using the Stylemix Cost Calculator Builder plugin. Successful exploitation could allow attackers to execute arbitrary SQL commands, leading to unauthorized data disclosure, data tampering, or deletion. This could result in data breaches exposing customer information, financial data, or intellectual property. Additionally, attackers might escalate their access within the compromised system or pivot to other internal resources. For e-commerce sites or service providers relying on accurate cost calculations, data integrity issues could disrupt business operations and damage customer trust. The vulnerability could also be leveraged to implant persistent backdoors or malware, further compromising system availability and security. Organizations worldwide that rely on WordPress and this plugin for their online presence are at risk, with potential regulatory and reputational consequences following a breach.

To mitigate CVE-2025-39587, organizations should first verify if they are using the Stylemix Cost Calculator Builder plugin version 3.2.65 or earlier. If so, they should monitor the vendor’s channels for an official patch and apply it immediately upon release. In the absence of a patch, organizations can implement Web Application Firewall (WAF) rules to detect and block SQL injection patterns targeting the plugin’s endpoints. Input validation and sanitization should be enforced at the application level to prevent malicious SQL code from being processed. Restricting database user permissions to the minimum necessary can limit the damage in case of exploitation. Regularly auditing logs for suspicious database queries and unusual application behavior can help detect attempted attacks early. Additionally, organizations should consider isolating the affected plugin or disabling it temporarily if it is not critical to operations until a fix is available. Maintaining up-to-date backups is essential to recover from any potential data loss or corruption.