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CVE-2026-5513— Online Scheduling and Appointment Booking System – Bookly <= 27.2 - Unauthenticated Stored Cross-Site Scripting via 'bookly-customer-full-name' Cookie

Quick assessment

Affected
ladela Online Scheduling and Appointment Booking System – Bookly
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.

Online Scheduling and Appointment Booking System是Bookly公司的一个预约系统插件。 Bookly Online Scheduling and Appointment Booking System 27.2及之前版本存在安全漏洞，该漏洞源于bookly-customer-full-name Cookie输入清理和输出转义不足，可能导致未经身份验证的攻击者注入任意Web脚本，在用户访问被注入页面时执行跨站脚本攻击。

CVSS 7.2 · High EPSS 0.32% · P23

Affected Version Matrix 1

VendorProduct Version RangeStatus
ladela Online Scheduling and Appointment Booking System – Bookly ≤ 27.2 affected
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I. Basic Information for CVE-2026-5513

Vulnerability Information
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Vulnerability Title
Online Scheduling and Appointment Booking System – Bookly <= 27.2 - Unauthenticated Stored Cross-Site Scripting via 'bookly-customer-full-name' Cookie
Source: CVE Program / CVE List V5
Vulnerability Description
The Online Scheduling and Appointment Booking System – Bookly plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'bookly-customer-full-name' cookie in versions up to, and including, 27.2 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires 'Remember personal information in cookies' setting to be enabled (disabled by default).
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
Bookly Online Scheduling and Appointment Booking System 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Online Scheduling and Appointment Booking System是Bookly公司的一个预约系统插件。 Bookly Online Scheduling and Appointment Booking System 27.2及之前版本存在安全漏洞，该漏洞源于bookly-customer-full-name Cookie输入清理和输出转义不足，可能导致未经身份验证的攻击者注入任意Web脚本，在用户访问被注入页面时执行跨站脚本攻击。
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
ladela Online Scheduling and Appointment Booking System – Bookly 0 ~ 27.2 -

II. Public POCs for CVE-2026-5513

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III. Intelligence Information for CVE-2026-5513

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Security Blog Posts for CVE-2026-5513 (1)

IV. Related Vulnerabilities

Same product: Online Scheduling and Appointment Booking System – Bookly
Same vendor: ladela
Same weakness: CWE-79

V. Comments for CVE-2026-5513

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