CVE-2026-41940
critical CISA KEVWebPros cPanel & WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function Vulnerability
Vendor / product: WebPros — cPanel & WHM and WP2 (WordPress Squared)
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.
CVSS
9.8
9.8 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (disclosure@vulncheck.com)
Timeline (UTC)
Published: 2026-04-29 16:16
Modified: 2026-10-26 20:10
NVD status: Analyzed
Last synced 1 day ago
Verified against the source API 2026-10-27 07:07 UTC
Exploitation
Listed in CISA KEV
Added 2026-04-30 · due 2026-05-03
Known ransomware use: Known
Required action (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected products
cpanel / cpanel ≥11.40 <86.0.41, ≥88.0.0 <110.0.97, ≥112.0.0 <118.0.63, ≥120.0.0 <124.0.35, ≥126.0.1 <126.0.54, ≥128.0.0 <130.0.19
cpanel / whm ≥11.40 <86.0.41, ≥88.0.0 <110.0.97, ≥112.0.0 <118.0.63, ≥120.0.0 <124.0.35, ≥126.0.1 <126.0.54, ≥128.0.0 <130.0.19
cpanel / wp_squared <136.1.7
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
References
- https://docs.cpanel.net/release-notes/release-notes disclosure@vulncheck.com
- https://docs.wpsquared.com/changelogs/versions/changelog/#13617 disclosure@vulncheck.com
- https://support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update-04-... disclosure@vulncheck.com
- https://www.namecheap.com/status-updates/ongoing-critical-security-vulnerability-in-cpanel... disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/cpanel-and-whm-authentication-bypass-via-login-flow disclosure@vulncheck.com
- https://labs.watchtowr.com/the-internet-is-falling-down-falling-down-falling-down-cpanel-w... af854a3a-2127-422b-91ae-364da2661108
- https://www.bleepingcomputer.com/news/security/critrical-cpanel-flaw-mass-exploited-in-sor... af854a3a-2127-422b-91ae-364da2661108
- https://github.com/watchtowrlabs/watchTowr-vs-cPanel-WHM-AuthBypass-to-RCE.py 134c704f-9b21-4f2e-91b3-4a467353bcc0
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-41940 134c704f-9b21-4f2e-91b3-4a467353bcc0
Data sources
CISA KEV — fetched 2026-10-27 06:50 UTC · record ↗
NVD CVE API 2.0 — fetched 2026-10-27 07:07 UTC · record ↗