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CVE-2026-41940

WebPros cPanel and WHM Authentication Bypass via Login Flow

CVSS 4.0 Critical 9.3Known exploited (CISA KEV)

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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.

Official description from the CVE record, published by VulnCheck. Copyright © 1999-2026 The MITRE Corporation. See /security/cve/legal for the CVE license. View the record on cve.org

Key data

CVSS 4.0 Critical 9.3

Score published by VulnCheck in the CVE record.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

  • Attack vector: Network

    The vulnerable component can be reached over a network, possibly from the Internet.

  • Attack complexity: Low

    No measurable action is needed to get around the system's built-in security controls. The attack is repeatable.

  • Attack requirements: None

    The attack works without any special deployment or execution conditions.

  • Privileges required: None

    No account or privileges are needed.

  • User interaction: None

    No action from any user is needed.

  • Vulnerable system: confidentiality: High

    Serious or total effect on the secrecy of data.

  • Vulnerable system: integrity: High

    Serious or total effect on the trustworthiness of data.

  • Vulnerable system: availability: High

    Serious or total effect on availability.

  • Subsequent systems: confidentiality: None

    No effect on other systems' data secrecy.

  • Subsequent systems: integrity: None

    No effect on other systems' data trustworthiness.

  • Subsequent systems: availability: None

    No effect on other systems' availability.

CVSS 3.1 Critical 9.8

Score published by VulnCheck in the CVE record.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Network

    The vulnerable component can be reached over a network, possibly from the Internet.

  • Attack complexity: Low

    No special conditions are needed. The attack can be repeated at will.

  • Privileges required: None

    No account or privileges are needed.

  • User interaction: None

    No action from any user is needed.

  • Scope: Unchanged

    The impact stays within the vulnerable component.

  • Confidentiality impact: High

    Serious or total effect on the secrecy of data.

  • Integrity impact: High

    Serious or total effect on the trustworthiness of data.

  • Availability impact: High

    Serious or total effect on availability.

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at first.org/cvss.

EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.
Score
0.98527 (98.5% probability)
Percentile
99.9%
Scores of
Nov 10, 2026
Model
v2026.06.15

CISA Known Exploited Vulnerabilities

This CVE is listed in the CISA KEV catalog.
Name in the catalog
WebPros cPanel & WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function Vulnerability
Added to the catalog
Apr 30, 2026
Federal due date
May 3, 2026
Ransomware campaigns
Known use

CISA assessment as of Apr 29, 2026

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.
Exploitation
Recorded by CISA as active
Automatable
yes
Technical impact
total

Weakness (CWE)

CWE catalog version 5.0.
CWE names: Copyright © 2006-2026, The MITRE Corporation. See /security/cve/legal for the CWE license.
  • CWE-306Missing Authentication for Critical Functionality

Affected products

Products listed in the CVE record, as the CNA published them.

  • WebPros cPanel

    • affected: 11.40.0.0 up to before 11.86.0.41
    • affected: 11.88.0.0 up to before 11.94.0.28
    • affected: 11.96.0.0 up to before 11.102.0.39
    • affected: 11.104.0.0 up to before 11.110.0.97
    • affected: 11.112.0.0 up to before 11.118.0.63
    • affected: 11.120.0.0 up to before 11.124.0.35
    • affected: 11.126.0.0 up to before 11.126.0.54
    • affected: 11.128.0.0 up to before 11.130.0.19
    • affected: 11.132.0.0 up to before 11.132.0.29
    • affected: 11.134.0.0 up to before 11.134.0.20
    • affected: 11.136.0.0 up to before 11.136.0.5

  • WebPros WP Squared

    • affected: before 11.136.1.7

  • WebPros WHM

    • affected: 11.40.0.0 up to before 11.86.0.41
    • affected: 11.88.0.0 up to before 11.94.0.28
    • affected: 11.96.0.0 up to before 11.102.0.39
    • affected: 11.104.0.0 up to before 11.110.0.97
    • affected: 11.112.0.0 up to before 11.118.0.63
    • affected: 11.120.0.0 up to before 11.124.0.35
    • affected: 11.126.0.0 up to before 11.126.0.54
    • affected: 11.128.0.0 up to before 11.130.0.19
    • affected: 11.132.0.0 up to before 11.132.0.29
    • affected: 11.134.0.0 up to before 11.134.0.20
    • affected: 11.136.0.0 up to before 11.136.0.5

References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

Timeline

  1. ID reserved
  2. Record published
  3. Added to CISA KEV
  4. Record last updated

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About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.
Cloud VPSDDoS protection

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:10 UTC. Sources and licenses