Medium severity · published Jun 14, 2025
CVE-2025-4667
Simply Schedule Appointments <= 1.6.8.30 - Authenticated (Contributor+) Stored Cross-Site Scripting via Multiple Shortcodes
6.4
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 22% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AB
Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin · croixhaug
through 1.6.8.30 · source: vendor
Affected product
AB
Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
croixhaug
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-4667
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-4667
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
wordpress.org
https://wordpress.org/plugins/simply-schedule-appointments/#developers
www.wordfence.com
https://www.wordfence.com/threat-intel/vulnerabilities/id/414173b9-d23e-4e44-bf8c-77a074bb09e9?source=cve
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