Security · October 25, 2026
Privacy Commission Warns of Major Data Breach Risk Due to PHP Vulnerability
The Personal Information Protection Commission has issued an urgent security alert to public institutions and private companies regarding the recently revealed PHP security vulnerability known as ‘PHP2Shell’. Authorities express concern that exploitation of this vulnerability could lead to not only web server breaches but also extensive data leaks from connected databases.
The PHP2Shell vulnerability, disclosed on October 21, allows attackers to execute malicious commands on web servers without any separate login or authentication procedures. PHP is widely used software for website and online service development. If vulnerable servers are attacked, there is a potential for service disruptions as well as personal data theft.
The commission emphasized the need for vigilance, particularly for environments where PHP-based database management tools like ‘phpMyAdmin’ are exposed to the public internet or where excessive database access rights have been granted to web service accounts. If attackers exploit server vulnerabilities to gain access to personal data databases, vast amounts of user information could be leaked.
In response, the commission recommends that organizations first check the versions of their PHP systems and apply the latest security patches. Unused web services should be removed, and it is essential to verify whether vulnerable PHP versions are in use in operational environments.
Moreover, database access controls need to be strengthened. Direct internet access to management tools such as phpMyAdmin should be limited, and the software must be updated to the latest version. Unnecessary configuration files should be cleaned up, and web service accounts should only be granted the minimal database access rights required for their tasks.
Monitoring access logs for unusual activities, such as large data extraction attempts, is also critical for preventing massive data breaches. Organizations should implement security monitoring and strengthen access log management to detect and block abnormal access attempts. Additionally, it is important to ensure that vulnerable PHP is not used in outsourced development and operational systems, as security incidents in services not directly managed by companies can also lead to data leaks.