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WordPress plugin

Appointment Hour Booking – Booking Calendar <= 1.5.94 — Missing Authorization

CVE-2026-66679Published · Updated

Action summary

Affected: ≤1.5.94Update to 1.5.95 or newer

All remediation steps
Watch plugin
Severity
Medium5.3
CVSS
5.3
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:N User interaction
None
S:U Scope
Unchanged
C:N Confidentiality
None
I:L Integrity
Low
A:N Availability
None
Weakness
CWE-862 Missing Authorization
Required access
No account needed
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Appointment Hour Booking – Booking Calendar appointment-hour-booking

  1. Affected≤ 1.5.94
  2. Patched in1.5.95

Update to 1.5.95 or newer.

You are affected if you run ≤ 1.5.94. Version 1.5.95 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Appointment Hour Booking – Booking Calendar.
  • No admin access? Run a passive check of your site. It reads public files only.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. Update to version 1.5.95, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Appointment Hour Booking – Booking Calendar to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Tiago Ventura.

The Appointment Hour Booking – Booking Calendar plugin for WordPress is vulnerable to unauthorized access in all versions up to, and including, 1.5.94. This is due to a missing capability check on a function. This makes it possible for unauthenticated attackers to perform an unauthorized action.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Appointment Hour Booking – Booking Calendar

All 16
More vulnerabilities in Appointment Hour Booking – Booking Calendar
SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored DOM-Based Cross-Site Scripting via Booking Form Single-Line Field via Schedule Calendar List Renderer
≤1.5.97Update to 1.5.98
CVE-2026-96573
Medium5.3 Unauthenticated Appointment Slot Capacity Bypass
≤1.5.94Update to 1.5.95
CVE-2026-86475
Medium5.3Unauthenticated Price Manipulation
≤1.5.87Update to 1.5.88
CVE-2026-16282
Medium6.4Authenticated (Contributor+) Stored Cross-Site Scripting
≤1.5.86Update to 1.5.87
CVE-2026-65514
Medium4.4Authenticated (Administrator+) Stored Cross-Site Scripting via 'Min/Max Length' Field Configuration
≤1.5.60Update to 1.5.61
CVE-2026-1083

Same weakness (Missing Authorization)

All Missing Authorization
Other Missing Authorization vulnerabilities
SeverityVulnerabilityCVEPublished
High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup≤5.25.25Update to 5.26.45
CVE-2026-120688
Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder≤1.0.2Update to 1.1
CVE-2026-125055
Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System≤3.3.9Update to 3.4.0
CVE-2026-119077
Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce≤5.127.0Update to 5.128.0
CVE-2026-121518

Timeline

  1. CVE published

    Severity medium, CVSS 5.3

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
CVE® identifiers
Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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