CVE entry · CVE-2026-41940
CVE-2026-41940: WebPros cPanel & WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function Vulnerability
WebPros cPanel & WHM (WebHost Manager) and WP2 (WordPress Squared) contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel.
- Actively exploited: added to CISA’s KEV catalog on April 30, 2026.
- Used by ransomware, according to CISA.
- Remediation deadline for US federal agencies: May 3, 2026.
Description from CISA’s KEV catalog.
What to do
- Check whether your estate includes WebPros cPanel & WHM and WP2 (WordPress Squared), including internet-facing devices.
- Apply the vendor’s patch or mitigations (references below). Failing that, isolate the product or stop using it, as CISA requires of US federal agencies.
- An exploited vulnerability has often been used before it was fixed: look for signs of compromise, especially on internet-facing devices.
References
- Vendor advisory or reference cited by CISA (support.cpanel.net)
- Vendor advisory or reference cited by CISA (docs.cpanel.net)
- Vendor advisory or reference cited by CISA (docs.wpsquared.com)
- NVD entry (NIST)
- CISA KEV catalog