Vulnerability · Published Sep 22, 2026 · Assigned by Wordfence
CVE-2026-93655Booking Calendar <= 11.8.3 - Reflected Cross-Site Scripting via 'wpbc_auto_fill' Parameter
Medium 6.1
In plain English
A medium-severity cross-site scripting in Booking Calendar from wpdevelop. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities).
Official description
The Booking Calendar plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'wpbc_auto_fill' parameter in all versions up to, and including, 11.8.3 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| wpdevelop | Booking Calendar | 0 – through 11.8.3 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/37fdbbc3-6151-4962-90fa-a621d01a5eb2?source=cve
- https://plugins.trac.wordpress.org/browser/booking/tags/11.8.3/_dist/all/_src/wpbc_all.js#L3396
- https://plugins.trac.wordpress.org/browser/booking/tags/11.8.3/js/wpbc_time-selector.js#L87
- https://plugins.trac.wordpress.org/browser/booking/tags/11.8.3/_dist/all/_src/wpbc_all.js#L3370
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3703002%40booking&new=3703002%40booking