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CVE-2026-9851— Booking Package <= 1.7.16 - Authenticated (Editor+) Privilege Escalation via Account Takeover to updateUser AJAX Action

Quick assessment

Affected
masaakitanaka Booking Package
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 Booking Package 1.7.16及之前版本存在安全漏洞，该漏洞源于package_app_action AJAX端点的updateUser分支缺少能力检查，处理程序仅验证nonce且调度程序将$admin

CVSS 7.2 · High EPSS 0.61% · P47

Affected Version Matrix 1

VendorProduct Version RangeStatus
masaakitanaka Booking Package ≤ 1.7.16 affected
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I. Basic Information for CVE-2026-9851

Vulnerability Information
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Vulnerability Title
Booking Package <= 1.7.16 - Authenticated (Editor+) Privilege Escalation via Account Takeover to updateUser AJAX Action
Source: CVE Program / CVE List V5
Vulnerability Description
The Booking Package plugin for WordPress is vulnerable to Privilege Escalation via Account Takeover in versions up to, and including, 1.7.16. This is due to a missing capability check on the 'updateUser' branch of the package_app_action AJAX endpoint, where the handler only validates a nonce and the dispatcher invokes Schedule::updateUser() with the $administrator argument hard-coded to 1, bypassing the only owner-restriction check inside that function and allowing the target user to be determined solely by attacker-supplied input passed directly to wp_update_user(). This makes it possible for authenticated attackers, with Editor-level access and above, to change the email address and password of any account, including Administrator accounts, resulting in a full site takeover.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress plugin Booking Package 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Booking Package 1.7.16及之前版本存在安全漏洞，该漏洞源于package_app_action AJAX端点的updateUser分支缺少能力检查，处理程序仅验证nonce且调度程序将$admin
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
masaakitanaka Booking Package 0 ~ 1.7.16 -

II. Public POCs for CVE-2026-9851

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III. Intelligence Information for CVE-2026-9851

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Security Blog Posts for CVE-2026-9851 (1)

Vendor Pages for CVE-2026-9851 (1)

IV. Related Vulnerabilities

Same product: Booking Package
Same vendor: masaakitanaka
Same weakness: CWE-639

V. Comments for CVE-2026-9851

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