dbcve.org
Missing AuthorizationWeakness · CWE-862

CVE-2026-39694

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 NSquared Simply Schedule Appointments simply-schedule-appointments allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Simply Schedule Appointments: from n/a through <= 1.6.10.2.

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

This is a missing authorization vulnerability in the Simply Schedule Appointments WordPress plugin. The issue allows attackers to exploit incorrectly configured access control security levels, likely due to missing capability checks or improper permission validation on certain plugin functions or AJAX endpoints.

MitigationImplement proper authorization checks (current_user_can, nonce verification) on all sensitive plugin functions and AJAX endpoints to ensure only authorized users can access scheduling features.

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
Low
Availability
None

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

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. Verify plugin installation and activation status
    Log into WordPress admin and navigate to Plugins > Installed Plugins. Look for 'Simply Schedule Appointments' in the list and confirm it is both installed and activated. Alternatively, check the file system at wp-content/plugins/ for the simply-schedule-appointments directory.
    Affected if The plugin is installed and activated in the WordPress environment
  2. Determine the installed plugin version
    In WordPress admin, find Simply Schedule Appointments in the Plugins list. The version number is displayed below the plugin name. If not visible in admin, check the main plugin file (e.g., simply-schedule-appointments.php) for the 'Version' header comment in the file header.
    Affected if The installed version matches or falls within the range of affected versions (compare your installed version to the affected ranges)
  3. Identify exposed AJAX action endpoints
    Examine the plugin source code for registered AJAX actions using add_action('wp_ajax_...') and add_action('wp_ajax_nopriv_...'). Look for sensitive functions tied to these actions that lack capability checks (current_user_can) or nonce validation. Use a tool or curl to test these endpoints without providing authentication credentials.
    Affected if AJAX endpoints handling sensitive operations are accessible without authentication (wp_ajax_nopriv) and lack proper authorization checks
  4. Test authorization on admin pages and functionality
    Attempt to access plugin admin pages and features directly via URL without being logged in, or with a low-privilege user account (subscriber level). Observe whether the application denies access or allows the operation to proceed without verifying user capabilities.
    Affected if Sensitive administrative functions or pages are accessible to unauthenticated users or users lacking proper capabilities
  5. Review capability checks in plugin code
    Search the plugin source code for current_user_can() calls around sensitive functions, especially those handling appointment data, user data, or plugin settings. Verify that every function performing privileged operations has appropriate capability checks. Check for missing or insufficient checks.
    Affected if Sensitive functions lack capability checks or use overly permissive capability requirements

The environment is affected if Simply Schedule Appointments is installed and activated, and the plugin version falls within the affected range or exposes sensitive endpoints/functions without proper authorization checks.

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 (current_user_can, nonce verification) on all sensitive plugin functions and AJAX endpoints to ensure only authorized users can access scheduling features.

Have this fixed Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA2.0 h
18.0 hours of engineering $3,200
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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-2026-39694 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
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  • Version or environment caveats, and links to real fixes
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