9.8Crítica KEV Usada en ransomware

CVE-2026-41940WebPros cPanel and WHM Authentication Bypass via Login Flow

WebPros cPanel; WebPros WP Squared; WebPros WHM Publicada: 2026-04-29 18:10 (hace 6 meses)

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

CISA confirmó el 30.04.2026 que esta vulnerabilidad se usa en ataques reales. Plazo para las agencias federales de EE. UU.: 03.05.2026.

Acción requerida: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. 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"

Descripción

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.

Debilidad (CWE): CWE-306

Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.

Productos y versiones afectados

Fabricante	Producto	Versiones
cpanel	cpanel	11.40.0.0 – < 11.86.0.41
cpanel	whm	11.40.0.0 – < 11.86.0.41
cpanel	wp squared	< 136.1.7
WebPros	cPanel	11.40.0.0 – < 11.86.0.41, 11.88.0.0 – < 11.94.0.28, 11.96.0.0 – < 11.102.0.39, 11.104.0.0 – < 11.110.0.97, 11.112.0.0 – < 11.118.0.63, 11.120.0.0 – < 11.124.0.35, 11.126.0.0 – < 11.126.0.54, 11.128.0.0 – < 11.130.0.19, 11.132.0.0 – < 11.132.0.29, 11.134.0.0 – < 11.134.0.20, 11.136.0.0 – < 11.136.0.5
WebPros	WHM	11.40.0.0 – < 11.86.0.41, 11.88.0.0 – < 11.94.0.28, 11.96.0.0 – < 11.102.0.39, 11.104.0.0 – < 11.110.0.97, 11.112.0.0 – < 11.118.0.63, 11.120.0.0 – < 11.124.0.35, 11.126.0.0 – < 11.126.0.54, 11.128.0.0 – < 11.130.0.19, 11.132.0.0 – < 11.132.0.29, 11.134.0.0 – < 11.134.0.20, 11.136.0.0 – < 11.136.0.5
WebPros	WP Squared	< 11.136.1.7

Referencias y parches

https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-28-2026 vendor-advisorypatchVendor Advisory
https://docs.cpanel.net/release-notes/release-notes release-notesRelease Notes
https://docs.wpsquared.com/changelogs/versions/changelog/#13617 release-notesRelease Notes
https://www.namecheap.com/status-updates/ongoing-critical-security-vulnerability-in-cpanel-april-28-2026 third-party-advisoryThird Party Advisory
https://www.vulncheck.com/advisories/cpanel-and-whm-authentication-bypass-via-login-flow third-party-advisoryThird Party Advisory
https://labs.watchtowr.com/the-internet-is-falling-down-falling-down-falling-down-cpanel-whm-authentication-b… ExploitThird Party Advisory
https://www.bleepingcomputer.com/news/security/critrical-cpanel-flaw-mass-exploited-in-sorry-ransomware-attacks/ Press/Media Coverage
https://github.com/watchtowrlabs/watchTowr-vs-cPanel-WHM-AuthBypass-to-RCE.py ExploitThird Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-41940 US Government Resource

Coincidencias CPE (NVD) (19)

cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:* ≥ 11.40 < 86.0.41
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:* ≥ 88.0.0 < 110.0.97
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:* ≥ 112.0.0 < 118.0.63
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:* ≥ 120.0.0 < 124.0.35
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:* ≥ 126.0.1 < 126.0.54
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:* ≥ 128.0.0 < 130.0.19
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:* ≥ 132.0.0 < 132.0.29
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:* ≥ 134.0.0 < 134.0.20
cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:* ≥ 136.0.0 < 136.0.5
cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:* ≥ 11.40 < 86.0.41
cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:* ≥ 88.0.0 < 110.0.97
cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:* ≥ 112.0.0 < 118.0.63
cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:* ≥ 120.0.0 < 124.0.35
cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:* ≥ 126.0.1 < 126.0.54
cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:* ≥ 128.0.0 < 130.0.19
cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:* ≥ 132.0.0 < 132.0.29
cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:* ≥ 134.0.0 < 134.0.20
cpe:2.3:a:cpanel:whm:*:*:*:*:*:*:*:* ≥ 136.0.0 < 136.0.5
cpe:2.3:a:cpanel:wp_squared:*:*:*:*:*:wordpress:*:* < 136.1.7

Puntuación CVSS

9.8Crítica

Fuente: VulnCheck · CVSS 3.1

Vector de ataque: Red
Complejidad: Baja
Privilegios: Ninguno
Interacción del usuario: Ninguna
Alcance: Sin cambio
Confidencialidad: Alto
Integridad: Alto
Disponibilidad: Alto

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

Todas las puntuaciones (4)

cna	CVSS 4.0	9.3Crítica
cna	CVSS 3.1	9.8Crítica
disclosure@vulncheck.com	CVSS 4.0	9.3Crítica
disclosure@vulncheck.com	CVSS 3.1	9.8Crítica

EPSS (probabilidad de explotación en 30 días)

98.53%

superior al 100 % de todas las CVE

Evaluación de CISA (SSVC)

Explotación: active
Automatizable: yes
Impacto técnico: total

Cronología

ID reservado2026-04-22
Publicada2026-04-29 18:10
Llegó a IP-DB2026-10-24 23:29
Añadida a KEV2026-04-30
Última actualización2026-10-26 23:10

Asignada por (CNA): VulnCheck
Estado en NVD: Analyzed

Ver en la fuente: CVE.org · NVD

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