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CVE-2026-7493— Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin <= 1.6.11.5 - Unauthenticated Denial of Service

Quick assessment

Affected
croixhaug Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
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 — Simply Schedule Appointments Booking Plugin 1.6.11.5及之前版本存在资源管理错误漏洞，该漏洞源于公开可访

CVSS 5.3 · Medium EPSS 0.44% · P36

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
croixhaug Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin ≤ 1.6.11.5 affected
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I. Basic Information for CVE-2026-7493

Vulnerability Information
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Vulnerability Title
Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin <= 1.6.11.5 - Unauthenticated Denial of Service
Source: CVE Program / CVE List V5
Vulnerability Description
The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to denial of service in all versions up to, and including, 1.6.11.5. This is due to a publicly accessible REST API endpoint (/wp-json/ssa/v1/async) that calls PHP's sleep() function on a user-supplied delay parameter without any rate limiting. This makes it possible for unauthenticated attackers to exhaust PHP worker processes, denying access to the site to legitimate users.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress plugin Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin 资源管理错误漏洞
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 — Simply Schedule Appointments Booking Plugin 1.6.11.5及之前版本存在资源管理错误漏洞，该漏洞源于公开可访
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
croixhaug Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin 0 ~ 1.6.11.5 -

II. Public POCs for CVE-2026-7493

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III. Intelligence Information for CVE-2026-7493

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Patches & Fixes for CVE-2026-7493 (1)

News Coverage for CVE-2026-7493 (1)

IV. Related Vulnerabilities

Same product: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Same vendor: croixhaug
Same weakness: CWE-400

V. Comments for CVE-2026-7493

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