Booking Calendar <= 11.8.2 - Authenticated (Editor+) Privilege Escalation to 'data_name' Parameter
The Booking Calendar plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 11.8.2 via the wpbc_ajax_option_save AJAX action. The vulnerability exists because the handle_ajax_save() function applies per-option safeguards only to names explicitly registered via register_option_policy(), causing get_option_policy() to return an empty policy — bypassing all can_save, force_mode, and allowed_keys checks — for any unregistered option name, including core WordPress options, while an attacker-controlled data_name parameter passes through sanitize_key() and is written directly to update_option() without restriction. This makes it possible for authenticated attackers with Editor-level access and above to escalate their privileges to Administrator by writing core WordPress options such as default_role=administrator and users_can_register=1, then self-registering a new Administrator account. The nonce check does not meaningfully restrict this attack, as both the nonce value and nonce action are attacker-supplied POST parameters, and a valid nonce is trivially obtainable via admin-ajax.php?action=rest-nonce.
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Plugin de WordPress | Booking Calendar | <= 11.8.2 | 11.8.3 |
Referencias
- Vector CVSS
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H- Debilidad (CWE)
CWE-269- Plataforma
- WordPress
- Paquete
Booking Calendar- Publicada
- 17.09.2026
- Actualizado
- 11.10.2026 10:23
Fuentes y licencias
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Historial de vulnerabilidades: Booking Calendar
Todas las vulnerabilidades publicadas de este paquete (Plugin de WordPress), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 38
- Primera → última
- 08.2014 10.2026
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Crítica 1
- Alta 8
- Media 28
- Baja 1
Divulgaciones por año
- 2017: 0
- 2018: 1
- 2019: 0
- 2020: 0
- 2021: 1
- 2022: 2
- 2023: 3
- 2024: 6
- 2025: 7
- 2026: 14
antes: 4
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Booking Calendar <= 11.8.2 - Authenticated (Editor+) Privilege Escalation to 'data_name' Parameter esta entrada
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