CVE-2026-41940

WebPros cPanel & WHM and WP2 (WordPress Squared): Missing Authentication for Critical Function

As of , CVE-2026-41940 in WebPros cPanel & WHM and WP2 (WordPress Squared) is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch now.

Exploited
Yes: CISA listed it on 30 April 2026
US federal deadline
3 May 20263 days after CISA listed it. US federal civilian agencies must fix it by then.
Used in ransomware campaigns
KnownCISA changed it from Unknown to Known on 5 May 2026.
EPSS score
0.99Higher than 99% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
Public exploit
1 Metasploit module and 1 Exploit-DB entry
Fix
Vendor advice: docs.cpanel.net, docs.wpsquared.com and support.cpanel.netLinks below, from CISA's entry.

What CISA says 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's required action

What the flaw is

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's 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.

The CVE record's description, from VulnCheck

CVE published
29 April 2026
Assigned by
VulnCheck
CVSS
9.3 Critical (CVSS 4.0, from the CNA)
CWE-306
Missing Authentication for Critical Function
CISA SSVC, exploitation
active
CISA SSVC, automatable
yes
CISA SSVC, technical impact
total

Timeline

  1. The CVE record was published.
  2. CISA added it to its list of exploited vulnerabilities.
  3. The US federal deadline to fix it.
  4. CISA changed its entry. Ransomware use: Unknown to Known.
  5. Exploit-DB published an exploit (EDB-ID 52574).

Public exploits

Facts from Metasploit's module list and Exploit-DB's index; we never copy exploit code.

  • Metasploit: cPanel/WHM CRLF Injection Authentication Bypass RCEexploit module, rank excellent
  • Exploit-DB: cPanel - CRLF InjectionEDB-ID 52574, 26 May 2026

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