Vulnerabilities / WP Booking System / WPSEC-2026-0836
WP Booking System <= 2.1.0.2 - Reflected Cross-Site Scripting via 'booking_id' Parameter
Medium 6.1
CWE-79Fixed in 2.1.0.3
- ID
- WPSEC-2026-0836
- Plugin
- WP Booking System – Booking Calendar (wp-booking-system)
- Affected
- all versions before 2.1.0.3
- Remediation
- Update to 2.1.0.3 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Weakness
- CWE-79
- Usage
- Plugin Low · Affected versions Low among sites WPSec scans, 2026-10-13
- Attack surface
- WP Booking System on WPSec AttackSurface
- Fix released
- Published
Description
The WP Booking System plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'booking_id' parameter on the edit calendar admin page in all versions up to, and including, 2.1.0.2 due to insufficient input sanitization and output escaping. The parameter value is echoed unescaped into an inline JavaScript call. This makes it possible for unauthenticated attackers to inject arbitrary web scripts that execute in a logged-in administrator's session if they can trick the administrator into clicking a crafted link.
References
- https://wpsec.com/vuln/WPSEC-2026-0836/
- https://plugins.svn.wordpress.org/wp-booking-system/tags/2.1.0.3/
- https://wordpress.org/plugins/wp-booking-system/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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