WebPros cPanel & WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function Vulnerability (CVE-2026-41940)
Severity: critical · Patch status: unknown · Since 2026-04-30 · CVE-2026-41940
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. CISA added CVE-2026-41940 to its Known Exploited Vulnerabilities catalog on Apr 30, 2026, which means attackers are exploiting it in the wild. CISA reports known use in ransomware campaigns.
What to do
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by May 3, 2026 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch