PT-2026-48947 · Simplehelp · Simplehelp

Published 2026-06-12 · Updated 2026-06-12 · CVE-2026-48558

Mitre

CVSS v3.1

10

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

SimpleHelp versions 5.5.15 and prior and 6.0 pre-release versions contain an authentication bypass vulnerability in the OIDC authentication flow. When OIDC authentication is configured, identity tokens submitted during login are accepted without verifying their cryptographic signature. In a vulnerable configuration, a remote, unauthenticated attacker can submit a forged token containing arbitrary identity claims to obtain a fully authenticated technician session. In some configurations, this may also allow bypass of multi-factor authentication. No user interaction is required.

Exploit

Fix

Improper Verification of Cryptographic Signature

Weakness Enumeration

CWE-347

Related Identifiers

CVE-2026-48558

Affected Products

Simplehelp

References · 5

• 🔥 https://horizon3.ai/attack-research/disclosures/cve-2026-48558-simplehelp-authentication-bypass-iocs · Exploit
• https://simple-help.com/security/simplehelp-security-update-2026-05 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-48558 · Security Note
• https://twitter.com/Horizon3Attack/status/2065482981985100036 · Twitter Post
• https://simple-help.com/release-news · Note