Vulnerability · Published Jan 6, 2026 · Assigned by Wordfence
CVE-2025-11723Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin <= 1.6.9.5 - Unauthenticated Sensitive Information Exposure
Medium 6.5
In plain English
A medium-severity weak randomness in Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin from croixhaug. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities).
Official description
The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 1.6.9.5 via the hash() function due to use of a hardcoded fall-back salt. This makes it possible for unauthenticated attackers to generate a valid token across sites running the plugin that have not manually set a salt in the wp-config.php file and access booking information that will allow them to make modifications.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| croixhaug | Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin | 0 – through 1.6.9.5 |
Weakness: CWE-330 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N