CVE-2018-20156 Explained : Impact and Mitigation
Learn about CVE-2018-20156, a critical vulnerability in the WP Maintenance Mode plugin for WordPress allowing remote code execution by site administrators. Find mitigation steps here.
WordPress WP Maintenance Mode Plugin Vulnerability
Understanding CVE-2018-20156
What is CVE-2018-20156?
The CVE-2018-20156 vulnerability allows users with the role of "site administrator" in WordPress to exploit the WP Maintenance Mode plugin versions before 2.0.7, enabling them to execute arbitrary PHP code on a multisite network.
The Impact of CVE-2018-20156
This vulnerability poses a significant risk as it allows unauthorized users to execute malicious code on the affected WordPress multisite networks.
Technical Details of CVE-2018-20156
Vulnerability Description
The WP Maintenance Mode plugin before version 2.0.7 for WordPress permits remote authenticated "site administrator" users to execute arbitrary PHP code across a multisite network.
Affected Systems and Versions
- Product: WP Maintenance Mode Plugin
- Vendor: N/A
- Versions Affected: Before 2.0.7
Exploitation Mechanism
The vulnerability can be exploited by users with the role of "site administrator" in WordPress to execute arbitrary PHP code remotely on a multisite network.
Mitigation and Prevention
Immediate Steps to Take
- Update the WP Maintenance Mode plugin to version 2.0.7 or later.
- Limit the number of users with the "site administrator" role.
- Monitor network activity for any suspicious behavior.
Long-Term Security Practices
- Regularly update all plugins and themes in WordPress.
- Implement strong password policies for user accounts.
- Conduct security audits and penetration testing regularly.
Patching and Updates
Ensure that all WordPress plugins, including WP Maintenance Mode, are kept up to date to prevent exploitation of known vulnerabilities.