Description
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.
Published: 2026-06-12
Score: 9.5 Critical
EPSS: < 1% Very Low
KEV: Yes
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Mon, 29 Jun 2026 20:30:00 +0000

Type Values Removed Values Added
References
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'active', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 29 Jun 2026 19:45:00 +0000

Type Values Removed Values Added
Metrics kev

{'dateAdded': '2026-06-29T00:00:00+00:00', 'dueDate': '2026-07-02T00:00:00+00:00'}


Mon, 29 Jun 2026 19:30:00 +0000


Fri, 12 Jun 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 12 Jun 2026 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Simple-help
Simple-help simplehelp
Vendors & Products Simple-help
Simple-help simplehelp

Fri, 12 Jun 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 12 Jun 2026 18:00:00 +0000

Type Values Removed Values Added
Description 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.
Title SimpleHelp Authentication Bypass via Missing OIDC JWT Signature Verification
Weaknesses CWE-347
References
Metrics cvssV3_1

{'score': 10, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.5, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'}


Subscriptions

Simple-help Simplehelp
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-06-29T20:08:39.963Z

Reserved: 2026-05-21T18:34:46.418Z

Link: CVE-2026-48558

cve-icon Vulnrichment

Updated: 2026-06-12T18:21:36.880Z

cve-icon NVD

Status : Deferred

Published: 2026-06-12T18:16:35.317

Modified: 2026-06-15T20:50:47.973

Link: CVE-2026-48558

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-29T21:00:04Z

Weaknesses