A critical vulnerability in the Joomla Helix3 extension allows unauthenticated remote attackers to execute arbitrary file operations, posing a severe risk to site integrity.

The plugin exposes an AJAX handler task that lacks proper authentication checks. This allows unauthenticated attackers to delete arbitrary files, write arbitrary JSON files, and modify sensitive template parameters.

With a CVSS score of 7.5, this high-severity vulnerability poses a significant risk of total site compromise. An attacker could overwrite configuration files to redirect traffic, inject malicious scripts, or delete core site components, leading to critical service downtime and potential data exfiltration.

Immediate Action: Immediately update the Helix3 extension to the latest patched version or disable the plugin if an update is not currently available.

Proactive Monitoring: Review web server access logs for suspicious POST requests targeting the Helix3 AJAX handler and look for unauthorized changes to template files.

Compensating Controls: Implement a Web Application Firewall (WAF) rule to block unauthorized access to the specific AJAX endpoints associated with the Helix3 plugin.

Public Exploit Available: false

This vulnerability is highly dangerous due to the lack of required authentication for destructive actions. Administrators should prioritize the remediation of this plugin immediately to prevent unauthorized administrative control over the Joomla environment.