CVE-2026-41940 · netVigilance record NV26-0102
WebPros cPanel & WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function
past due ransomware
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.
CISA deadline 2026-05-03 · passed 4 months ago · applies to US federal civilian agencies; used elsewhere as a reference SLA
What happened
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.
Who is affected
WebPros cPanel & WHM and WP2 (WordPress Squared). Affected version ranges are listed in the vendor advisory and the NVD entry linked under Sources.
Weakness class: CWE-306.
Timeline
- Added to CISA KEVExploitation in the wild confirmed by CISA
- CISA remediation deadlinepassed 4 months ago
Sources
- NVD entry for CVE-2026-41940 nvd.nist.gov/vuln/detail/CVE-2026-41940
- CISA Known Exploited Vulnerabilities catalog www.cisa.gov/known-exploited-vulnerabilities-catalog
- support.cpanel.net support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026
- docs.cpanel.net docs.cpanel.net/release-notes/release-notes/
- docs.wpsquared.com docs.wpsquared.com/changelogs/versions/changelog/#13617
- nvd.nist.gov nvd.nist.gov/vuln/detail/CVE-2026-41940"