Medium severity · published Oct 8, 2026
CVE-2026-105193
Booking Calendar < 11.8 - Unauthenticated Booking Information Disclosure and Modification via Predictable Booking Hash
4.8
CVSS
0.1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 2% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BC
Booking Calendar ·
before 11.8 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-105193
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-105193
exploit
https://wpscan.com/vulnerability/c6a81cf3-095d-4d7e-83c5-80f44327e7fe/
More from Booking Calendar
2.7
CVE-2026-105195
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