---
id: CVE-2026-92619
title: >-
  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
summary: >-
  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 …
severity: high
cvss: 7.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-269
vendor: wpdevelop
product: Booking Calendar
affected:
  - booking_calendar <= 11.8.2
published: '2026-09-18'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T19:17:17.980'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-92619'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/booking/tags/11.8.2/includes/page-form-builder/ajax/bfb-ajax.php#L82
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/booking/tags/11.8.2/includes/save-load-option/save-load-option.php#L138
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/booking/tags/11.8.2/includes/save-load-option/save-load-option.php#L197
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/booking/tags/11.8.2/includes/save-load-option/save-load-option.php#L303
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?reponame=&old=3699185%40booking&new=3699185%40booking
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/ab68a6b2-e9b0-4efa-bd01-c6e3e11011db?source=cve
    label: security@wordfence.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-18T17:24:20.308495Z'
epss: 0.00656
epssPercentile: 0.49264
ingestedAt: '2026-09-18T07:37:23.436Z'
---

## Overview

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`.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.