CVE-2026-41940: WebPros cPanel & WHM and WP2 (WordPress Squared) (Critical, CVSS 9.3)
- CVSS
- 9.3 Critical (v4.0)
- EPSS
- 98.5% chance of exploitation in the next 30 days (higher than 99.9% of CVEs)
- Exploited in the wild
- Yes, on CISA’s KEV list since Apr 30, 2026; used by ransomware
- Public exploit
- Yes, reported in a Metasploit module, Exploit-DB, a Nuclei template and 73 GitHub repositories
- Weakness
- CWE-306
- Vector
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- Published
- Apr 29, 2026
- CISA fix-by date
- May 3, 2026 (for US federal agencies)
What it is
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.
Description from the National Vulnerability Database.
What to do
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.
Check whether you run WebPros cPanel & WHM and WP2 (WordPress Squared), then apply the vendor’s fix or mitigation from the advisories below. Because this flaw is exploited or has public exploit code, treat it as urgent and check for signs of compromise, not just the patch level.
Advisories and fixes
- docs.cpanel.net
- docs.wpsquared.com
- support.cpanel.net
- www.namecheap.com
- www.vulncheck.com
- www.cisa.gov
ThreatRoundup coverage
One Operator, Two AI Agents: Stolen LLM Keys and Fake US Students
Sources: NVD, FIRST EPSS, CISA KEV, and public exploit databases (availability only). ThreatRoundup reports whether public exploit code exists but never links to it: fake proof-of-concepts that infect security researchers are common. This page updates automatically.