dbcve.org
Missing AuthorizationWeakness · CWE-862

CVE-2026-39664

MEDIUM · 5.3 CVSS v3.1 Published 2026-04-08
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
62/100
Remediation priority · Elevated
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
Missing Authorization vulnerability in leadrebel Leadrebel leadrebel allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Leadrebel: from n/a through <= 1.0.2.

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

Missing Authorization vulnerability in Leadrebel <= 1.0.2 allows attackers to exploit incorrectly configured access control security levels. The application fails to properly validate authorization permissions before granting access to certain functionality or resources, potentially allowing unauthorized users to perform actions beyond their intended privileges.

MitigationImplement proper authorization checks at all sensitive endpoints and enforce role-based access control (RBAC) consistent with the principle of least privilege.

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
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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 Leadrebel plugin installation and version
    Check the plugin directory for Leadrebel - look for plugin files or check WordPress plugins admin page for the installed version
    Affected if Leadrebel plugin version 1.0.2 or earlier is installed
  2. Verify plugin is active
    Check if the Leadrebel plugin is currently enabled in the plugin management interface
    Affected if The plugin is active and running version 1.0.2 or earlier
  3. Confirm authorization vulnerability exists
    Inspect the plugin code for missing capability checks or nonce validation on sensitive functions - look for admin actions that lack current_user_can() or wp_verify_nonce() calls
    Affected if Sensitive functions lack proper authorization checks and the plugin is in use
  4. Test access control enforcement
    Attempt to access plugin admin functions or endpoints with a low-privilege user account or as an unauthenticated user
    Affected if Unauthorized users can access admin functionality or perform privileged actions

You are affected if the Leadrebel plugin version 1.0.2 or earlier is installed and active, and sensitive functions lack proper authorization checks allowing privilege escalation.

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 proper authorization checks at all sensitive endpoints and enforce role-based access control (RBAC) consistent with the principle of least privilege.

Have this fixed Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA3.0 h
19.0 hours of engineering $3,380
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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-2026-39664 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
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