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CVE-2025-13754

Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin <= 1.6.9.16 - Missing Authorization to Unauthenticated Sensitive Information Exposure

MEDIUM
5.3
CVSS Score
Published: December 19, 2025 at 06:48 AM UTC
Updated: June 17, 2026 at 08:34 AM UTC
1 product affected across 1 vendorSimply Schedule Appointments

Using Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin by croixhaug?

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 1.6.9.16. This is due to the plugin exposing its admin embed endpoint at `/wp-json/ssa/v1/embed-inner-admin` without authentication, which leaks plugin settings including staff names, business names, and configuration data that are not publicly displayed on the booking form. This makes it possible for unauthenticated attackers to extract private business configuration. In premium versions with integrations configured, this might also expose other sensitive data including API keys for external services.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Simply Schedule Appointments· Nsquaredwordpress-plugin
60%
v ≤ 1.6.9.16

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Source: cverecord
https://www.wordfence.com/threat-intel/vulnerabilities/id/10d7a50c-41e9-41b7-a171-d72dbe08e7b7?source=cve
Source: cverecord
https://plugins.trac.wordpress.org/changeset/3421427/simply-schedule-appointments/trunk/includes/class-shortcodes.php

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMWordfence
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-862

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