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Missing AuthorizationWeakness · CWE-862

CVE-2026-5387

CRITICAL · 9.3 CVSS v4.0 Published 2026-04-15
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
The vulnerability, if exploited, could allow an unauthenticated miscreant to perform operations intended only for Simulator Instructor or Simulator Developer (Administrator) roles, resulting in privilege escalation with potential for modification of simulation parameters, training configuration, and training records.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

This is an authentication bypass vulnerability allowing unauthenticated attackers to escalate privileges to Simulator Instructor or Simulator Developer (Administrator) roles. Successful exploitation enables modification of simulation parameters, training configuration, and training records within the simulator system.

MitigationImplement robust authentication and role-based access control (RBAC) to ensure all privileged operations require proper authentication and authorization verification before execution.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
Authentication
X
User interaction
None
Scope
X

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify the simulator product and version
    Locate the installed simulator system documentation, about page, or version file. Common locations include: help menu, installation directory readme, or system information panel. Record the exact product name and version number.
    Affected if The installed version is within a vulnerable version range (compare to any published affected versions from the vendor)
  2. Verify authentication is required for administrative functions
    Attempt to access simulator administrative features (Instructor or Developer roles) without providing credentials. Check if the system returns a login prompt or directly grants access.
    Affected if The system grants access to administrative functions without any authentication credentials
  3. Inspect role-based access control configuration
    Examine the simulator's security or RBAC configuration files. Look for settings that control whether authentication is enforced before role escalation or privilege assignment.
    Affected if RBAC enforcement is disabled or set to permit unauthenticated role changes
  4. Check for unauthenticated privilege escalation endpoints
    Review simulator API endpoints or URLs related to role assignment, user provisioning, or privilege modification. Test whether these endpoints accept requests without valid session tokens.
    Affected if Privilege escalation endpoints accept and process requests without authentication tokens
  5. Confirm administrative role assignment requires authorization
    Using a non-privileged or anonymous session, attempt to assign yourself Instructor or Developer (Administrator) role. Verify the system rejects the request with proper authorization failure.
    Affected if Unauthenticated or unprivileged users can successfully escalate to Administrator roles

A user is affected if the simulator version matches a vulnerable release AND the system allows unauthenticated access to privilege escalation or administrative role assignment functions.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Implement robust authentication and role-based access control (RBAC) to ensure all privileged operations require proper authentication and authorization verification before execution.

Have this fixed Scoped from the published advisory
  • Consultation8.0 h
  • Implementation16.0 h
  • Testing12.0 h
  • Review / QA8.0 h
44.0 hours of engineering $7,720
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-5387 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data