{
 "id": "WPSEC-2026-0807",
 "url": "https://wpsec.com/vuln/WPSEC-2026-0807/",
 "json_url": "https://wpsec.com/vuln/WPSEC-2026-0807/advisory.json",
 "markdown_url": "https://wpsec.com/vuln/WPSEC-2026-0807/index.md",
 "title": "Booking Calendar <= 11.9 - Missing Authorization to Unauthenticated Block Times Availability Timeline Disclosure",
 "description": "The Booking Calendar plugin for WordPress is vulnerable to unauthorized access of data via the WPBC_AJX_AVAILABILITY_TIMESLOTS_READ AJAX action in all versions up to, and including, 11.9, due to a missing capability check and missing nonce validation on the wpbc_availability_timeslots_ajax_read function, which was also registered for logged-out users. This makes it possible for unauthenticated attackers to read the Block Times (Time Slots Availability) administration timeline for any booking resource, including administrator-blocked time intervals and the IDs, approval status and time ranges of existing bookings.",
 "plugin": {
  "slug": "booking",
  "name": "Booking Calendar",
  "full_name": "Booking Calendar",
  "wordpress_org": "https://wordpress.org/plugins/booking/",
  "advisories_url": "https://wpsec.com/vuln/plugin/booking/",
  "attacksurface": "https://attacksurface.wpsec.com/plugin/booking"
 },
 "type": "NO AUTHORISATION",
 "cwe": [
  "CWE-862"
 ],
 "cve": [],
 "cvss": {
  "version": "3.1",
  "score": 5.3,
  "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
  "severity": "Medium"
 },
 "affected": {
  "ranges": [
   {
    "from": null,
    "from_inclusive": true,
    "to": "11.9.1",
    "to_inclusive": false
   }
  ],
  "text": [
   "all versions before 11.9.1"
  ]
 },
 "introduced_in": null,
 "fixed_in": "11.9.1",
 "remediation": "Update to 11.9.1 or later.",
 "fix_released": "2026-10-11T18:36:01+00:00",
 "published": "2026-10-12T19:07:11+00:00",
 "updated": "2026-10-12T09:38:03.602579+00:00",
 "also_published_as": null,
 "references": [
  "https://wpsec.com/vuln/WPSEC-2026-0807/",
  "https://plugins.svn.wordpress.org/booking/tags/11.9.1/",
  "https://wordpress.org/plugins/booking/"
 ],
 "attacksurface_url": "https://attacksurface.wpsec.com/plugin/booking",
 "source": "WPSec",
 "license": {
  "name": "CC BY 4.0",
  "url": "https://creativecommons.org/licenses/by/4.0/"
 },
 "usage": {
  "plugin": "Medium",
  "affected_versions": "Medium",
  "as_of": "2026-10-12"
 }
}