CVE-2026-2519 MEDIUM

CVE-2026-2519: Online Scheduling and Appointment Booking System – Bookly <= 27.0 - Unauthenticated Price Manipulation via 'tips'

Vendor Ladela
Product Online Scheduling and Appointment Booking System – Bookly
Weakness CWE-472
Published April 9, 2026
Last update April 13, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

What the vulnerability does

01Description

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.

Explanation of Vulnerability in Simple Terms

02Summary

Bookly versions 27.0 and earlier contain an integrity vulnerability that allows unauthenticated attackers to modify data over the network. The vulnerability requires no user interaction and can be exploited remotely. Site administrators should update to a version newer than 27.0 to remediate this issue.

What an attacker can do

03Attacker Capabilities

Modify data on the site without authentication.

Potential impact on your site

04Site Impact

Attackers can alter appointment data, settings, or other site information without logging in.

Conditions required to exploit

05Prerequisites

Network access only; no authentication or user interaction required.

Key dates

06Disclosure timeline

April 9, 2026 CVE published
April 13, 2026 Record updated