🔐 CVE Alert

CVE-2025-4667

MEDIUM 6.4

Simply Schedule Appointments <= 1.6.8.30 - Authenticated (Contributor+) Stored Cross-Site Scripting via Multiple Shortcodes

CVSS Score
6.4
EPSS Score
0.0%
EPSS Percentile
0th

The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's ssa_admin_upcoming_appointments, ssa_admin_upcoming_appointments, and ssa_past_appointments shortcodes in all versions up to, and including, 1.6.8.30 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

CWE CWE-79
Vendor croixhaug
Product appointment booking calendar — simply schedule appointments booking plugin
Published Jun 14, 2025
Last Updated Apr 8, 2026
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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability

Affected Versions

croixhaug / Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
0 ≤ 1.6.8.30

References

NVD ↗ CVE.org ↗ EPSS Data ↗
wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/414173b9-d23e-4e44-bf8c-77a074bb09e9?source=cve wordpress.org: https://wordpress.org/plugins/simply-schedule-appointments/#developers plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.6.8.24/includes/class-shortcodes.php#L718 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.6.8.24/includes/class-shortcodes.php#L754 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/tags/1.6.8.24/includes/class-shortcodes.php#L784 plugins.trac.wordpress.org: https://plugins.trac.wordpress.org/changeset/3306064/simply-schedule-appointments/tags/1.6.8.32/includes/class-shortcodes.php

Credits

Muhammad Yudha - DJ