CVE-2026-92619 Booking Calendar <= 11.8.2 - Authenticated (Editor+) Privilege Escalation to 'data_name' Parameter
Authenticated editors can escalate to administrator by manipulating unregistered WordPress options via the Booking Calendar plugin.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-92619?
CVE-2026-92619 is a high-severity vulnerability in wpdevelop Booking Calendar, published on 18 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
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`.
Weakness: CWE-269
Which versions are affected by CVE-2026-92619?
How do I fix CVE-2026-92619?
No fix has been published for CVE-2026-92619 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-92619 being exploited?
There is no known exploitation of CVE-2026-92619 in the wild and no public exploit code.
Sources
Also known as GHSA-jrfx-j7fq-9588.