CVE-2021-27230 : What You Need to Know

ExpressionEngine before 5.4.2 and 6.x before 6.0.3 allows PHP Code Injection by certain authenticated users who can leverage Translate::save() to write to an _lang.php file under the system/user/language directory.

Understanding CVE-2021-27230

This CVE identifies a vulnerability in ExpressionEngine versions before 5.4.2 and 6.x before 6.0.3 that enables PHP Code Injection by specific authenticated users.

What is CVE-2021-27230?

This CVE pertains to a security issue in ExpressionEngine where authenticated users can exploit Translate::save() to inject PHP code into the _lang.php file within the system/user/language directory.

The Impact of CVE-2021-27230

The vulnerability allows threat actors to execute arbitrary PHP code on the affected system, potentially leading to unauthorized access, data breaches, or system compromise.

Technical Details of CVE-2021-27230

ExpressionEngine versions before 5.4.2 and 6.x before 6.0.3 are susceptible to PHP Code Injection by leveraging Translate::save() to tamper with the _lang.php file.

Vulnerability Description

The flaw enables authenticated users to write and execute PHP code in the _lang.php file, posing a severe risk to the integrity and security of the system.

Affected Systems and Versions

ExpressionEngine versions prior to 5.4.2 and 6.x before 6.0.3 are impacted by this vulnerability, exposing them to potential exploitation.

Exploitation Mechanism

By utilizing the Translate::save() functionality, authenticated attackers can inject malicious PHP code into the system/user/language directory, opening avenues for unauthorized actions.

Mitigation and Prevention

It is crucial to mitigate the risks associated with CVE-2021-27230 to safeguard systems and data.

Immediate Steps to Take

Users are advised to update ExpressionEngine to versions 5.4.2 and 6.0.3 or later to patch the PHP Code Injection vulnerability.

Long-Term Security Practices

Regularly monitor security advisories from ExpressionEngine and apply updates promptly to address potential vulnerabilities.

Patching and Updates

Stay informed about security patches and updates released by ExpressionEngine to maintain a secure environment and prevent exploitation of known vulnerabilities.