Online Scheduling and Appointment Booking System – Bookly <= 27.2 - Unauthenticated Stored Cross-Site Scripting via 'bookly-customer-full-name' Cookie
| CVE | CVE-2026-5513 |
|---|---|
| CVSS | 7.2 (High) |
| Publicly Published | June 12, 2026 |
| Last Updated | June 13, 2026 |
| Researcher |
Naoya Takahashi (nakko)
|
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).
Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.
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Vulnerability Details for Online Scheduling and Appointment Booking System – Bookly
| Software Type | Plugin |
|---|---|
| Software Slug | bookly-responsive-appointment-booking-tool (view on wordpress.org) |
| Patched? | Yes |
| Remediation | Update to version 27.3, or a newer patched version |
| Affected Version |
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| Patched Version |
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Recent vulnerabilities in Online Scheduling and Appointment Booking System – Bookly
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