CVE-2026-22390: Builderall Builder Code Injection Flaw

CVE-2026-22390 Overview

CVE-2026-22390 is a code injection vulnerability affecting the Builderall Builder for WordPress plugin (builderall-cheetah-for-wp). This vulnerability allows attackers to inject and execute arbitrary code through improper control of code generation, classified under CWE-94 (Improper Control of Generation of Code). The vulnerability affects all versions of the plugin through version 3.0.1.

Critical Impact

This remote code execution (RCE) vulnerability could allow attackers to execute arbitrary code on vulnerable WordPress installations, potentially leading to complete site compromise, data theft, and further lateral movement within hosting infrastructure.

Affected Products

• Builderall Builder for WordPress plugin (builderall-cheetah-for-wp) versions up to and including 3.0.1
• WordPress installations running the vulnerable plugin versions

Discovery Timeline

• March 5, 2026 - CVE-2026-22390 published to NVD
• March 5, 2026 - Last updated in NVD database

Technical Details for CVE-2026-22390

Vulnerability Analysis

This vulnerability stems from improper control of code generation within the Builderall Builder for WordPress plugin. The plugin fails to properly sanitize or validate user-supplied input before incorporating it into dynamically generated code, creating a code injection vector. Attackers can exploit this flaw to execute arbitrary PHP code on the underlying server with the privileges of the web server process.

WordPress page builder plugins typically process user input to generate page layouts and content dynamically. When this input handling lacks proper validation and sanitization, malicious actors can craft specially designed requests that inject executable code into the application's processing flow.

Root Cause

The root cause of CVE-2026-22390 is improper input validation in the code generation routines of the Builderall Builder plugin. The plugin accepts user-controlled data that is subsequently used in code execution contexts without adequate sanitization or escaping. This allows injection of arbitrary code that gets executed during the plugin's normal operation.

Attack Vector

The vulnerability can be exploited remotely by sending crafted requests to a WordPress site running the vulnerable plugin version. An attacker could leverage this flaw to inject malicious PHP code, which would then be executed on the server. This could result in:

• Full remote code execution on the web server
• Installation of backdoors or web shells
• Access to the WordPress database and configuration files
• Lateral movement to other sites on shared hosting environments
• Data exfiltration of sensitive user information

The vulnerability mechanism involves improperly validated user input being passed to code execution functions. For detailed technical analysis, refer to the Patchstack RCE Vulnerability Advisory.

Detection Methods for CVE-2026-22390

Indicators of Compromise

• Unexpected PHP files or web shells appearing in the WordPress installation directories
• Unusual outbound network connections from the web server
• Suspicious entries in web server access logs showing unusual POST requests to plugin endpoints
• Modified WordPress core files or plugin files
• New administrator accounts created without authorization

Detection Strategies

• Monitor web server logs for suspicious requests targeting /wp-content/plugins/builderall-cheetah-for-wp/ endpoints
• Implement file integrity monitoring to detect unauthorized changes to plugin files
• Deploy Web Application Firewall (WAF) rules to detect code injection patterns in request parameters
• Scan for known web shell signatures in the WordPress installation directory
• Review access logs for unusual patterns of requests to the Builderall Builder plugin

Monitoring Recommendations

• Enable detailed logging for WordPress and the web server to capture request parameters
• Configure alerting for new file creation events within the WordPress directory structure
• Monitor for unusual PHP process execution or system command invocations
• Implement network monitoring to detect potential command and control communications
• Regularly audit WordPress user accounts for unauthorized additions or privilege changes

How to Mitigate CVE-2026-22390

Immediate Actions Required

• Update the Builderall Builder for WordPress plugin to a patched version when available
• If no patch is available, consider temporarily disabling the plugin until a fix is released
• Implement WAF rules to filter potentially malicious requests targeting the plugin
• Review web server logs for signs of exploitation attempts
• Conduct a security audit of the WordPress installation to check for existing compromise

Patch Information

Organizations should monitor the Patchstack vulnerability advisory and the official WordPress plugin repository for security updates. Applying the latest plugin update that addresses this code injection vulnerability is the recommended remediation.

Workarounds

• Temporarily deactivate and remove the Builderall Builder for WordPress plugin if it is not critical for site operations
• Implement IP-based access restrictions to the WordPress admin area and plugin endpoints
• Deploy a Web Application Firewall with rules to block code injection payloads
• Use WordPress security plugins to add additional layers of protection against RCE attacks
• Ensure the web server runs with minimal privileges and proper file permission configurations

# Configuration example - Disable the plugin via WP-CLI if available
wp plugin deactivate builderall-cheetah-for-wp

# Set restrictive file permissions on plugin directory
chmod -R 644 /path/to/wordpress/wp-content/plugins/builderall-cheetah-for-wp/
find /path/to/wordpress/wp-content/plugins/builderall-cheetah-for-wp/ -type d -exec chmod 755 {} \;