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,…

Code

The project this record applies to. Exploit listings stay in References.

• Plugin source · wordpress.org

Timeline

Detection, updates, and resolution for this record.

1. Apr 9, 2026 · NIST NVD

   Detected

   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'

2. Jun 17, 2026 · NIST NVD

   Updated

   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'

Sources

• CVE.orgVulnerability recordCVE-2026-2519

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-2026-2519

  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 agai

  nvd.nist.gov

References

• Reference · plugins.trac.wordpress.org
• Reference · plugins.trac.wordpress.org
• Reference · plugins.trac.wordpress.org
• Reference · plugins.trac.wordpress.org
• Reference · booking-wp-plugin.com
• Reference · wordfence.com