WebPros cPanel and WHM's Login Flow Authentication Bypass Gives Unauthenticated Attackers Unauthorized Access to the Control Panel; CISA's May 3rd KEV Deadline Has Passed

Last refreshed2026-09-27

Status: KEV | Advisory ID: CVE-2026-41940

Key Details

CVE	CVE-2026-41940
Vulnerability Name	WebPros cPanel & WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function Vulnerability
Affected products	WebPros cPanel & WHM and WP2 (WordPress Squared)
Exploitation status	Listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating confirmed active exploitation.
Classified as	CWE-306 (Missing Authentication for Critical Function)
KEV listing	Added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2026-04-30.
Exploitation prediction (EPSS)	98.53% probability of exploitation in the next 30 days (100% percentile) -- FIRST.org's EPSS model.
Federal remediation deadline	2026-05-03 (CISA KEV, Binding Operational Directive).

Affected Products, Subsystems & Sectors

Vendor	Product	Affected Versions	Patch Status
WebPros	cPanel & WHM and WP2 (WordPress Squared)

Vendor

Product

Affected Versions

Patch Status

WebPros

cPanel & WHM and WP2 (WordPress Squared)

Subsystems	General OT
Sectors	Multiple

What to Know

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.

What to Do

Monitor WebPros's web page for any future patch releases.

References

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-41940
CVE	https://www.cve.org/CVERecord?id=CVE-2026-41940

Source

Reference

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-41940

CVE

https://www.cve.org/CVERecord?id=CVE-2026-41940

KEV Required Action

Field	Value
KEV Link	https://www.cisa.gov/known-exploited-vulnerabilities-catalog
Date Added to KEV	2026-04-30
Required Action Due Date	2026-05-03
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.

Field

Value

KEV Link

https://www.cisa.gov/known-exploited-vulnerabilities-catalog

Date Added to KEV

2026-04-30

Required Action Due Date

2026-05-03

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.