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CVE-2025-13317— Appointment Booking Calendar <= 1.3.96 - Missing Authorization to Arbitrary Booking Confirmation via 'cpabc_ipncheck' Parameter

Quick assessment

Affected
codepeople Appointment Booking Calendar
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Appointment Booking Calendar 1.3.96及之前版本存在安全漏洞，该漏洞源于缺少授权检查，可能导致未授权预订确认。

CVSS 5.3 · Medium EPSS 0.28% · P18
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I. Basic Information for CVE-2025-13317

Vulnerability Information
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Vulnerability Title
Appointment Booking Calendar <= 1.3.96 - Missing Authorization to Arbitrary Booking Confirmation via 'cpabc_ipncheck' Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Appointment Booking Calendar plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 1.3.96. This is due to the plugin exposing an unauthenticated booking processing endpoint (cpabc_appointments_check_IPN_verification) that trusts attacker-supplied payment notifications without verifying their origin, authenticity, or requiring proper authorization checks. This makes it possible for unauthenticated attackers to arbitrarily confirm bookings and insert them into the live calendar via the 'cpabc_ipncheck' parameter, triggering administrative and customer notification emails and disrupting operations.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress plugin Appointment Booking Calendar 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Appointment Booking Calendar 1.3.96及之前版本存在安全漏洞，该漏洞源于缺少授权检查，可能导致未授权预订确认。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
codepeople Appointment Booking Calendar * ~ 1.3.96 -

II. Public POCs for CVE-2025-13317

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III. Intelligence Information for CVE-2025-13317

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Same Patch Batch · codepeople · 2025-11-22 · 3 CVEs total

CVE-2025-13384 7.5 HIGH CP Contact Form with PayPal <= 1.3.56 - Missing Authorization to Unauthenticated Arbitrary
CVE-2025-13318 5.3 MEDIUM Booking Calendar Contact Form <= 1.2.60 - Missing Authorization to Unauthenticated Arbitra

IV. Related Vulnerabilities

Same product: Appointment Booking Calendar
Same vendor: codepeople
Same weakness: CWE-862

V. Comments for CVE-2025-13317

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