Online Scheduling and Appointment Booking System <= 28.2 - Unauthenticated Authorization Bypass via PHP Type Juggling via 'verification_code' Parameter Type Juggling via json_data
The Online Scheduling and Appointment Booking System – Bookly plugin for WordPress is vulnerable to Authorization Bypass via PHP Type Juggling in all versions up to, and including, 28.2. This is due to the postValidateCustomer() function using a loose PHP inequality operator (!=) to compare the session-stored one-time verification code against the attacker-supplied verification_code parameter — a flaw that is further exposed by the booking AJAX controller registering all its methods as wp_ajax_nopriv_ handlers and unconditionally overriding csrfTokenValid() to return true, leaving the endpoint both unauthenticated and CSRF-unprotected. This makes it possible for unauthenticated attackers to bypass the phone/email ownership verification step and overwrite the name, email, phone, and address fields of any arbitrary existing Bookly customer record, redirecting that customer's booking notifications to attacker-controlled contact details. The bypass is achievable because the json_data input channel decodes input via json_decode(), which preserves real PHP types and causes the wp_kses filter to leave non-string values such as the JSON boolean true untouched; submitting true as the verification_code satisfies the loose comparison against the session's non-zero integer code (generated by mt_rand(100000, 999999)), causing true != <non-zero int> to evaluate as false and the guard to be bypassed.
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| Plattform | Paket | Anfällige Versionen | Behoben in |
|---|---|---|---|
| WordPress-Plugin | Online Scheduling and Appointment Booking System – Bookly | <= 28.2 | 28.3 |
Verweise
- CVSS-Vektor
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N- Schwäche (CWE)
CWE-285- Plattform
- WordPress
- Paket
Online Scheduling and Appointment Booking System – Bookly- Veröffentlicht
- 24.09.2026
- Aktualisiert
- 11.10.2026 10:23
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Schwachstellenhistorie: Online Scheduling and Appointment Booking System – Bookly
Alle veröffentlichten Schwachstellen dieses Pakets (WordPress-Plugin), neueste zuerst. Zeigt, ob es ein einmaliger Ausrutscher ist oder ein Paket, das man im Auge behalten muss.
- Einträge insgesamt
- 32
- Erste → letzte
- 02.2018 10.2026
- Ohne Fix
- 0
- In Angriffen ausgenutzt
- 0
Verteilung nach Schweregrad
- Kritisch 1
- Hoch 12
- Mittel 19
Veröffentlichungen pro Jahr
- 2018: 1
- 2019: 0
- 2020: 0
- 2021: 1
- 2022: 0
- 2023: 5
- 2024: 1
- 2025: 0
- 2026: 24
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Online Scheduling and Appointment Booking System <= 28.2 - Unauthenticated Authorization Bypass via PHP Type Juggling via 'verification_code' Parameter Type Juggling via json_data dieser Eintrag
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