# CVE-2026-41940: WebPros cPanel and WHM Authentication Bypass via Login Flow

> CVE-2026-41940: WebPros cPanel and WHM Authentication Bypass via Login Flow. CVSS 9.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2026-41940
Last updated: 2026-09-30T18:18:18Z

- Published: 2026-04-29 15:10 UTC · Updated: 2026-09-30 18:18 UTC · Assigner: VulnCheck
- CVSS: 9.8 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 98.5%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2026-04-30, federal due date 2026-05-03, ransomware use: Known
- CWE: CWE-306

## 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.

## CISA 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.

## Affected vendors and products

- WebPros: cPanel
- WebPros: WHM
- WebPros: WP Squared

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-41940)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-41940)
- [https://docs.cpanel.net/release-notes/release-notes](https://docs.cpanel.net/release-notes/release-notes)
- [https://docs.wpsquared.com/changelogs/versions/changelog/\#13617](https://docs.wpsquared.com/changelogs/versions/changelog/#13617)
- [https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026](https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026)
- [https://www.namecheap.com/status-updates/ongoing-critical-security-vulnerability-in-cpanel-april-28-2026](https://www.namecheap.com/status-updates/ongoing-critical-security-vulnerability-in-cpanel-april-28-2026)
- [https://www.vulncheck.com/advisories/cpanel-and-whm-authentication-bypass-via-login-flow](https://www.vulncheck.com/advisories/cpanel-and-whm-authentication-bypass-via-login-flow)

---

_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


---
Canonical: https://rewindex.com/cve/CVE-2026-41940 · Markdown: https://rewindex.com/cve/CVE-2026-41940.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-41940 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:14:43.047Z