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.
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Fixes

Solution

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Workaround

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History

Thu, 09 Apr 2026 13:00:00 +0000

Type Values Removed Values Added
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.
Title Online Scheduling and Appointment Booking System – Bookly <= 27.0 - Unauthenticated Price Manipulation via 'tips'
Weaknesses CWE-472
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published:

Updated: 2026-04-09T12:28:06.471Z

Reserved: 2026-02-15T06:39:59.038Z

Link: CVE-2026-2519

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-04-09T13:16:42.843

Modified: 2026-04-09T13:16:42.843

Link: CVE-2026-2519

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses