CVE-2026-2519
Received Received - Intake
Price Manipulation in Bookly Plugin via Unvalidated Tips Parameter

Publication date: 2026-04-09

Last updated on: 2026-04-09

Assigner: Wordfence

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.
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Meta Information
Published
2026-04-09
Last Modified
2026-04-09
Generated
2026-06-16
AI Q&A
2026-04-09
EPSS Evaluated
2026-06-15
NVD
CVE-2026-2519
EUVD
EUVD-2026-20890
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
bookly bookly From 27.1 (inc)
bookly bookly to 27.0 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-472 The web application does not sufficiently verify inputs that are assumed to be immutable but are actually externally controllable, such as hidden form fields.
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Executive Summary

CVE-2026-2519 is a vulnerability in the Bookly plugin for WordPress, specifically in its Online Scheduling and Appointment Booking System. The issue arises because the plugin trusts user-supplied input for the 'tips' parameter without validating it on the server side against the configured price.

This lack of validation allows unauthenticated attackers to submit a negative number as the 'tips' value, which can manipulate the total price calculation and reduce the total price to zero.

Impact Analysis

This vulnerability can allow attackers to manipulate the pricing of services or appointments booked through the Bookly plugin by submitting negative tip values.

As a result, attackers can reduce the total price to zero, potentially allowing them to obtain services without payment.

This can lead to financial loss for businesses using the plugin and undermine the integrity of the booking and payment system.

Mitigation Strategies

The vulnerability CVE-2026-2519 in the Bookly plugin for WordPress is fixed in version 27.1.

To mitigate this vulnerability, you should immediately update the Bookly plugin to version 27.1 or later.

Updating ensures that the price manipulation issue via the 'tips' parameter is resolved and improves overall security and stability.

Compliance Impact

The provided information does not specify any direct impact of the CVE-2026-2519 vulnerability on compliance with common standards and regulations such as GDPR or HIPAA.

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