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Research · Apr 29, 2026

Critical Authentication Bypass Vulnerability in WebPros cPanel & WHM and WP2

A serious authentication bypass vulnerability has been identified in WebPros cPanel & WHM and WP2, allowing unauthorized access to critical functions.

What changed

WebPros has acknowledged a significant security flaw in its cPanel & WHM and WP2 products. This vulnerability enables unauthenticated remote attackers to bypass authentication mechanisms, potentially granting them unauthorized access to sensitive control panel functionalities.

The implications of this vulnerability are severe, as it could lead to unauthorized manipulation of server settings and data exposure.

Who is affected

The vulnerability impacts a variety of users and organizations relying on WebPros products for web hosting and management.

Specific groups that may be affected include:

  • Web hosting providers using cPanel & WHM.
  • Website owners utilizing WP2 (WordPress Squared).
  • Developers and system administrators managing web applications hosted on these platforms.
  • Any organization that relies on these tools for their online presence.

What to do

Organizations using WebPros cPanel & WHM and WP2 should take immediate action to mitigate this vulnerability. It is crucial to monitor for any unusual activity and ensure that all security measures are in place.

Regular updates and patches should be applied to maintain the integrity of systems.

  • Review and update security configurations in cPanel & WHM and WP2.
  • Implement additional access controls and monitoring systems.
  • Stay informed about updates from WebPros regarding this vulnerability.
  • Conduct security audits to identify any potential exposure.
Critical Authentication Bypass Vulnerability in WebPros cPa… · ZeroDay Findings