CVE-2026-105193: vulnerability in Booking Calendar
Booking Calendar < 11.8 - Unauthenticated Booking Information Disclosure and Modification via Predictable Booking Hash
Published
0Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Track
exploitation probability
—
observed exploitation
nono source reports it
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.
Affected products
Unknown · Booking CalendarRelated CVEs — Booking Calendar
In the same product, most dangerous first.