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.
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| Platforma | Paczka | Podatne wersje | Poprawka w wersji |
|---|---|---|---|
| Wtyczka WordPress | Booking Calendar | <= 11.8.2 | 11.8.3 |
Odnośniki
- Wektor CVSS
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H- Słabość (CWE)
CWE-269- Platforma
- WordPress
- Paczka
Booking Calendar- Ujawniono
- 17.09.2026
- Aktualizacja
- 11.10.2026 10:23
Źródła i licencje
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Historia podatności: Booking Calendar
Wszystkie opisane podatności tej paczki (Wtyczka WordPress), od najnowszej. Widać, czy to jednorazowa wpadka, czy paczka, której trzeba pilnować.
- Wszystkich wpisów
- 38
- Pierwsza → ostatnia
- 08.2014 10.2026
- Bez poprawki
- 0
- Wykorzystywana w atakach
- 0
Rozkład istotności
- Krytyczna 1
- Wysoka 8
- Średnia 28
- Niska 1
Ujawnienia w latach
- 2017: 0
- 2018: 1
- 2019: 0
- 2020: 0
- 2021: 1
- 2022: 2
- 2023: 3
- 2024: 6
- 2025: 7
- 2026: 14
wcześniej: 4
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Booking Calendar <= 11.8.2 - Authenticated (Editor+) Privilege Escalation to 'data_name' Parameter ten wpis
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