---
id: CVE-2026-105193
title: >-
  The Booking Calendar WordPress plugin before 11.8 does not generate its
  per-booking access hashes with sufficient entropy, deriving each from a
  low-entropy time-seeded value, which can allow unauthenticated attackers who
  are able to dete…
summary: >-
  The Booking Calendar WordPress plugin before 11.8 does not generate its
  per-booking access hashes with sufficient entropy, deriving each from a
  low-entropy time-seeded value, which can allow unauthenticated attackers who
  are able to dete…
severity: none
cwe:
  - CWE-326
product: Booking Calendar
affected:
  - booking_calendar < 11.8
published: '2026-10-08'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T06:16:39.473'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-105193'
references:
  - url: 'https://wpscan.com/vulnerability/c6a81cf3-095d-4d7e-83c5-80f44327e7fe/'
    label: contact@wpscan.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-08T07:18:54.837Z'
---

## Overview

The Booking Calendar WordPress plugin before 11.8 does not generate its per-booking access hashes with sufficient entropy, deriving each from a low-entropy time-seeded value, which can allow unauthenticated attackers who are able to determine a booking's creation time to predict the hash and then read that booking's personal data or modify the booking in place.

## Remediation

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