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CVE-2026-6286— Booking for Appointments and Events Calendar <= 2.2 - Unauthenticated Stored Cross-Site Scripting via Customer Name Fields in Booking Submission

Quick assessment

Affected
melograno Booking for Appointments and Events Calendar – Amelia
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 Amelia是WordPress基金会的一个预约与活动预订插件。 WordPress Amelia 2.2及之前版本存在跨站脚本漏洞，该漏洞源于AddBookingCommand跳过nonce验证导致认证绕过，且sanitize_text_field函数仅移除HTML标签而保留双引号，客户名字段在管理后台日历视图被直接插入JavaScript模板字面量并通过innerHTML渲染，可能导致未经身份验证的攻击者注入任意Web脚本，在管理员访问日历页面并悬停恶意预约时执行。

CVSS 7.2 · High EPSS 0.62% · P49

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise

Affected Version Matrix 1

VendorProduct Version RangeStatus
melograno Booking for Appointments and Events Calendar – Amelia ≤ 2.2 affected
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I. Basic Information for CVE-2026-6286

Vulnerability Information
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Vulnerability Title
Booking for Appointments and Events Calendar <= 2.2 - Unauthenticated Stored Cross-Site Scripting via Customer Name Fields in Booking Submission
Source: CVE Program / CVE List V5
Vulnerability Description
The Booking for Appointments and Events Calendar – Amelia plugin for WordPress is vulnerable to Stored Cross-Site Scripting via customer name fields in versions up to and including 2.2. This is due to an authentication bypass where the AddBookingCommand explicitly skips nonce verification (Command.php line 186), allowing unauthenticated users to submit booking data. While the plugin applies sanitize_text_field() to customer firstName and lastName fields (BookingApplicationService.php lines 302-308), this function only removes HTML tags and preserves special characters including double quotes. The vulnerability manifests in the administrative Calendar view where a FullCalendar eventContent callback interpolates customer names directly into JavaScript template literals (redesign/dist/index.js line 199) and renders them via innerHTML without proper HTML entity encoding. Because double quotes are preserved, an attacker can inject payloads like '" onmouseover="alert(document.cookie)"' to break out of the title attribute and inject malicious event handlers. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that will execute when an administrator accesses the Calendar page and hovers over the malicious appointment.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress Amelia 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Amelia是WordPress基金会的一个预约与活动预订插件。 WordPress Amelia 2.2及之前版本存在跨站脚本漏洞，该漏洞源于AddBookingCommand跳过nonce验证导致认证绕过，且sanitize_text_field函数仅移除HTML标签而保留双引号，客户名字段在管理后台日历视图被直接插入JavaScript模板字面量并通过innerHTML渲染，可能导致未经身份验证的攻击者注入任意Web脚本，在管理员访问日历页面并悬停恶意预约时执行。
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
melograno Booking for Appointments and Events Calendar – Amelia 0 ~ 2.2 -

II. Public POCs for CVE-2026-6286

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III. Intelligence Information for CVE-2026-6286

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Patches & Fixes for CVE-2026-6286 (2)

Vendor Advisories for CVE-2026-6286 (1)

Vendor Pages for CVE-2026-6286 (4)

Other References for CVE-2026-6286 (1)

IV. Related Vulnerabilities

Same product: Booking for Appointments and Events Calendar – Amelia
Same vendor: melograno
Same weakness: CWE-79

V. Comments for CVE-2026-6286

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