Microsoft’s SharePoint platform is facing active exploitation following the public release of a proof-of-concept (PoC) for a critical authentication bypass vulnerability tracked as CVE-2026-55040. Patched in July’s Patch Tuesday, the flaw allows unauthenticated actors to impersonate SharePoint users by forging JSON Web Tokens (JWTs). Since the PoC surfaced, security researchers and telemetry providers have observed real-world attempts that underscore the
Tag: authentication bypass
cPanel compromise: CVE-2026-41940 and the Filemanager backdoor
A critical cPanel/WebHost Manager flaw tracked as CVE-2026-41940 is being actively exploited to deploy a cross-platform backdoor known as Filemanager. Security researchers tied the activity to a threat actor using the handle Mr_Rot13, and observed rapid, automated scanning and exploitation from thousands of attacker IPs worldwide. The attacks move quickly from an initial authentication bypass to persistent access via injected
Critical Flaw in User Registration Membership Plugin (CVE-2026-1492) Lets Attackers Bypass WordPress Authentication
A newly disclosed vulnerability in a popular WordPress plugin can allow attackers to log in as administrators without a username or password. Tracked as CVE-2026-1492 and carrying a CVSS v4.0 score of 9.8, the flaw affects all versions of the User Registration Membership plugin up through 5.1.2. The issue was documented in early March 2026 by CYFIRMA researchers and represents