CVEvulnerability

CVE-2026-41940

9.3 CRITICAL Known exploited Published 2026-04-29 Modified 2026-10-26 Official page ↗

CISA Known Exploited Vulnerability

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

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.

Added to KEV: 2026-04-30
Remediation due: 2026-05-03
Ransomware use: Known
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.
Notes: https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026 ; https://docs.cpanel.net/release-notes/release-notes/ ; https://docs.wpsquared.com/changelogs/versions/changelog/#13617 ; https://nvd.nist.gov/vuln/detail/CVE-2026-41940"

Status: Analyzed
Published: 2026-04-29
Last modified: 2026-10-26
Assigner: [email protected]
CVSS 4.0 ([email protected]): 9.3 CRITICAL — 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1 ([email protected]): 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses: 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.

Affected configurations

• cpanel cpanel (>= 11.40 < 86.0.41) • cpanel cpanel (>= 88.0.0 < 110.0.97) • cpanel cpanel (>= 112.0.0 < 118.0.63) • cpanel cpanel (>= 120.0.0 < 124.0.35) • cpanel cpanel (>= 126.0.1 < 126.0.54) • cpanel cpanel (>= 128.0.0 < 130.0.19) • cpanel cpanel (>= 132.0.0 < 132.0.29) • cpanel cpanel (>= 134.0.0 < 134.0.20) • cpanel cpanel (>= 136.0.0 < 136.0.5) • cpanel whm (>= 11.40 < 86.0.41) • cpanel whm (>= 88.0.0 < 110.0.97) • cpanel whm (>= 112.0.0 < 118.0.63) • cpanel whm (>= 120.0.0 < 124.0.35) • cpanel whm (>= 126.0.1 < 126.0.54) • cpanel whm (>= 128.0.0 < 130.0.19) • cpanel whm (>= 132.0.0 < 132.0.29) • cpanel whm (>= 134.0.0 < 134.0.20) • cpanel whm (>= 136.0.0 < 136.0.5) • cpanel wp squared (< 136.1.7)

Weakness · CWE (1)

CWE-306 Missing Authentication for Critical Functionality weakness

References