CVE-2026-41940: WebPros cPanel and WHM Authentication Bypass via Login Flow
Critical · CVSS 9.8 (CVSS 3.1)KEV known exploitedEPSS 98.5%, 100th percentilePublished Updated Assigner: VulnCheck
In CISA’s Known Exploited Vulnerabilities catalog: WebPros cPanel & WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function Vulnerability.
Added , federal remediation due . Known ransomware use: Known.
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Description
cPanel and WHM versions after 11.40 contain an authentication bypass vulnerability in the login flow that allows unauthenticated remote attackers to gain unauthorized access to the control panel.
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · CWE-306
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
WebPros: cPanelWebPros: WHMWebPros: WP Squared
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- docs.cpanel.net/release-notes/release-notes (opens in new tab)
- docs.wpsquared.com/changelogs/versions/changelog/ (opens in new tab)
- support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-202… (opens in new tab)
- www.namecheap.com/status-updates/ongoing-critical-security-vulnerability-in-cpanel-apri… (opens in new tab)
- www.vulncheck.com/advisories/cpanel-and-whm-authentication-bypass-via-login-flow (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)