← All advisories

critical 3 October 2026 · Severity 9.1/10 · CVE-2026-93399

Bookly: missing authorization

What's happening

Bookly has a missing authorization flaw in every version up to 28.2 (included): anyone can perform actions that should be reserved for authorised users. Anyone can exploit it, without an account on the site. More than 60,000 websites use it.

What to do

Update Bookly to version 28.3 or later (Dashboard → Plugins in WordPress). If you can't update yet, deactivate it until you can.

What else does an attacker see on your website? Check for free in a few seconds.

Analyse your site for free

With WebBorder Escudo we email you the same day if a plugin on your website has a known vulnerability.

Source: Wordfence Intelligence (Defiant, Inc.). Original record · CVE-2026-93399. Original title: «Online Scheduling and Appointment Booking System <= 28.2 - Insecure Direct Object Reference to Unauthenticated Arbitrary Booking Token Disclosure and Deletion via 'order_id' Parameter».

Data licence

Copyright 2012-2026 Defiant Inc.. Defiant hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute this software vulnerability information. Any copy of the software vulnerability information you make for such purposes is authorized provided that you include a hyperlink to this vulnerability record and reproduce Defiant's copyright designation and this license in any such copy.

Copyright 1999-2026 The MITRE Corporation. CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE®). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy.