WebPros cPanel & WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function Vulnerability
WebPros — cPanel
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.
9.8
98.5%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- Apr 29, 2026
- Modified
- Sep 30, 2026
- Added to KEV
- Apr 30, 2026
- Federal patch due
- May 3, 2026
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.
Weakness classification
Affected packages
Proof-of-concept & exploitation references
8 foundWeaponization
Public repositories whose name or description references CVE-2026-41940, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
- ynsmroztas/cPanelSniper★ 508
CVE-2026-41940 — cPanel & WHM Authentication Bypass via Session-File CRLF Injection
updated Oct 15, 2026
- sakidekin/CVE-2026-41940-PoC★ 119
cPanel & WHM Authentication Bypass via CVE-2026-41940 explotation
updated Oct 17, 2026
- assetnote/cpanel2shell-scanner★ 92
High fidelity scanner for CVE-2026-41940 (cPanel & WHM authentication bypass)
updated Sep 27, 2026
- XsanFlip/poc-cpanel-cve-2026-41940★ 63
updated Oct 10, 2026
- adriyansyah-mf/cve-2026-41940-poc★ 28
updated Sep 27, 2026
- ZeroDayEvil/CVE-2026-41940-PoC★ 28
updated Oct 1, 2026
- Sachinart/CVE-2026-41940-cpanel-0day★ 26
CVE-2026-41940 latest cPanel & WHM 0day - 70 million websites are possible to expose by Chirag Artani
updated Oct 15, 2026
- ilmndwntr/CVE-2026-41940-MASS-EXPLOIT★ 13
CVE-2026-41940 SUPPORT SINGLE & MASS SCAN EXPLOIT
updated Sep 27, 2026
References
Frequently asked questions
What is CVE-2026-41940?
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.
How severe is CVE-2026-41940?
CVE-2026-41940 has a CVSS base score of 9.8 out of 10 (CVSS 3.1).
Is CVE-2026-41940 actively exploited in the wild?
Yes. CVE-2026-41940 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Apr 30, 2026, meaning CISA has confirmed evidence of active exploitation. It is also flagged as used in ransomware campaigns.
What is the EPSS score for CVE-2026-41940?
98.5% - meaning FIRST.org's EPSS model estimates a 98.5% probability this vulnerability will be exploited in the wild within 30 days (100% percentile among all scored CVEs).
Is there exploit tooling available for CVE-2026-41940?
Yes - a public Nuclei template referencing CVE-2026-41940 exist in public repositories we checked. We also found 8 public GitHub repositories referencing this CVE.
What type of vulnerability is CVE-2026-41940?
CVE-2026-41940 is classified under CWE-306 (CWE-306 Missing Authentication for Critical Function).
Cross-checked against
Impactr finds and proves whether CVE-2026-41940 - or flaws like it - are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.
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