CVE-2026-105193 | BDVDB-2026-384682 Detail

Booking Calendar

Description#

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.

Impact#

Per CVSS v3.1: confidentiality impact low, integrity impact low, availability impact none. Attack vector: network.

Weaknesses#

CWE-326 Inadequate Encryption Strength

References#

https://wpscan.com/vulnerability/c6a81cf3-095d-4d7e-83c5-80f44327e7fe/

Exploit#

https://wpscan.com/vulnerability/c6a81cf3-095d-4d7e-83c5-80f44327e7fe/

History#

Version 12026-10-08Record published in the CVE List.

Published

Published: 2026-10-08
Last modified: 2026-10-08

Vendor information

Vendor: Not stated
Product: Booking Calendar

Score

4.8 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 1.7.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
< 11.8
Fixed
11.8

Scoring System

CVSS v4.0

Not available

CVSS v3.1

4.8 Medium

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Metric breakdown
Attack Vector	Network
Attack Complexity	High
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity	Low
Availability	None

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).