Exploited vulnerability · CISA KEV

Is CVE-2026-41940 exploited? Yes: in CISA KEV since 30 Apr 2026

Gociux · WebPros cPanel & WHM and WP2 (WordPress Squared) · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2026-41940, WebPros cPanel & WHM and WP2 (WordPress Squared) Missing Authentication for Critical Function Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 30 Apr 2026, 1 days after it was published. It is known to be used in ransomware campaigns. It affects WebPros cPanel & WHM and WP2 (WordPress Squared). If you run it, CISA's required action is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

What it is

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.

What to do

1. Check whether you run it. Look for cPanel & WHM and WP2 (WordPress Squared) in your asset inventory, including appliances and cloud images. Stack check lists every exploited WebPros CVE at once.
2. Apply the fix. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 29 Apr 2026.
4. Get told next time. Email alerts when CISA adds a CVE for WebPros.

References

• support.cpanel.net/hc/en-us/articles/40073787579671-cPanel-WHM-Security-Update
• docs.cpanel.net/release-notes/release-notes/
• docs.wpsquared.com/changelogs/versions/changelog/
• nvd.nist.gov/vuln/detail/CVE-2026-41940"

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in April 2026 · act-now radar.