Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin <= 1.6.9.5 - Unauthenticated Sensitive Information Exposure

Use of Insufficiently Random Values
CVE CVE-2025-11723
CVSS Medium (6.5)
Publicly Published January 5, 2026
Last Updated January 6, 2026
Researcher Lucas Montes (NiRoX)
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.

References

1 affected software package

Software Type Plugin
Software Slug simply-schedule-appointments (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 1.6.9.5
Patched Version
  • 1.6.9.6
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