CVE-2026-2519
Online Scheduling and Appointment Booking System – Bookly <= 27.0 - Unauthenticated Price Manipulation via 'tips'
- State
- Published
- Severity
- 5.3 Medium
- Published
- Apr 9, 2026
- Updated
- Apr 13, 2026
- Reserved
- Feb 15, 2026
Description
The Online Scheduling and Appointment Booking System – Bookly plugin for WordPress is vulnerable to price manipulation via the 'tips' parameter in all versions up to, and including, 27.0. This is due to the plugin trusting a user-supplied input without server-side validation against the configured price. This makes it possible for unauthenticated attackers to submit a negative number to the 'tips' parameter, causing the total price to be reduced to zero.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N | Wordfence |
Weaknesses
- CWE-472 External Control of Assumed-Immutable Web Parameter
Affected Products
| Product | Versions |
|---|---|
Online Scheduling and Appointment Booking System – Booklyladela |
|
References
- https://www.wordfence.com/threat-intel/vulnerabilities/id/ead87d8b-2659-4e8b-a0b9-138b1db89e36?source=cve
- https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/trunk/lib/UserBookingData.php#L355
- https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/trunk/frontend/modules/booking/Ajax.php#L709
- https://plugins.trac.wordpress.org/browser/bookly-responsive-appointment-booking-tool/trunk/lib/CartInfo.php#L450
- https://plugins.trac.wordpress.org/changeset/3480956/
- https://www.booking-wp-plugin.com/change-log/
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