ProCircular Critical Alert: cPanel & WHM Authentication Bypass Vulnerability

Preview text: ProCircular Critical Alert: cPanel & WHM Authentication Bypass Vulnerability 96 Immediate…

Wednesday, Apr 29, 2026 at 5:43 PM EasternHubSpot

ProCircular SOCProCircular Critical Alert: cPanel & WHM Authentication Bypass Vulnerability

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Subject: ProCircular Critical Alert: cPanel & WHM Authentication Bypass Vulnerability
Preview text: ProCircular Critical Alert: cPanel & WHM Authentication Bypass Vulnerability 96 Immediate…
From: eeike@procircular.com
Brand: ProCircular SOC
ESP: HubSpot
Sent: Wed Apr 29, 2026, 5:43 PM ET
Sent to: procircular.com
Size: 38 KB
Images: 2
Links: 6, 1 of them buttons
Subject length: 77 characters

Against ProCircular SOC's usual

Sent in the 5 PM hour, which holds 11% of its emails; 45% arrive in the 9 AM hour. The subject is 77 characters; its average is 53.

Email headers

What the brand's servers put on this email. Our receiving servers, the address we subscribed with and unsubscribe links are left out.

From: Erin Eike <[email protected]>
Reply-To: [email protected]
Subject: ProCircular Critical Alert: cPanel & WHM Authentication Bypass Vulnerability
Date: Wed, 29 Apr 2026 16:43:18 -0500
Message-ID domain: bf06x.hubspotemail.net
Return-Path domain: bf06x.hubspotemail.net
DKIM signature: d=bf06x.hubspotemail.net s=hs2; d=procircular.com s=hs2
Authentication: dkim=pass (bf06x.hubspotemail.net), dkim=pass (procircular.com), spf=pass (bf06x.hubspotemail.net), dmarc=pass (procircular.com)
List-Unsubscribe: Present, one-click
Feedback-ID sender: HubSpot

from bid47vr.bf06x.hubspotemail.net [158.247.24.149] by our receiving server with ESMTPS

Other sending headers (names only): X-HS-Cid, X-Report-Abuse-To

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	Apr 29, 2026 5:43 PM	ProCircular Critical Alert: cPanel & WHM Authentication Bypass Vulnerability (this email)
	Apr 29, 2026 10:17 AM	SOC 2 keeps coming up…
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	Apr 20, 2026 9:19 AM	ProCircular Weekly Cyber Briefing - April 20, 2026