CVE-2026-105193

The Booking Calendar WordPress plugin, in versions before 11.8 , is vulnerable to unauthenticated booking information disclosure and modification. The root cause is the use of insufficient entropy when generating per-booking access hashes, as they are derived from a low-entropy time-seeded value ...

CVE-2026-105193 Booking Calendar < 11.8 - Unauthenticated Booking Information Disclosure and Modification via Predictable Booking Hash

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...