Booking Plugin for WordPress Appointments – Time Slot <= 1.4.7 - Unauthenticated Arbitrary Email Sending

Improper Input Validation
CVE CVE-2025-12842
CVSS Medium (5.3)
Publicly Published November 18, 2025
Last Updated November 19, 2025
Researcher Md. Moniruzzaman Prodhan (NomanProdhan)
Description

The Booking Plugin for WordPress Appointments – Time Slot plugin for WordPress is vulnerable to unauthorized email sending in versions up to, and including, 1.4.7 due to missing validation on the tslot_appt_email AJAX action. This makes it possible for unauthenticated attackers to send appointment notification emails to arbitrary recipients with attacker-controlled text content in certain email fields, potentially enabling the site to be abused for phishing campaigns or spam distribution.

References

1 affected software package

Software Type Plugin
Software Slug timeslot (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 1.4.7
Patched Version
  • 1.4.8
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