Simply Schedule Appointments <= 1.6.6.20 - Reflected Cross-Site Scripting

6.1
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2024-22311
CVSS 6.1 (Medium)
Publicly Published March 26, 2024
Last Updated April 1, 2024
Researcher Rafie Muhammad - Awesome Motive, Inc.

Description

The Simply Schedule Appointments plugin for WordPress is vulnerable to Reflected Cross-Site Scripting in versions up to, and including, 1.6.6.20 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.

References

Share

Vulnerability Details for Simply Schedule Appointments

Software Type Plugin
Software Slug simply-schedule-appointments (view on wordpress.org)
Patched? Yes
Remediation Update to version 1.6.6.24, or a newer patched version
Affected Version
  • <= 1.6.6.20
Patched Version
  • 1.6.6.24

Recent vulnerabilities in Simply Schedule Appointments

# Title CVE ID CVSS Researchers Date
1 Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin <= 1.6.12.10 - Authenticated (Contributor+) Insecure Direct Object Reference to Sensitive Information Exposure CVE-2026-13358 6.5 Michael Iden (Mickhat) August 15, 2026
2 Simply Schedule Appointments < 1.6.12.6 - Unauthenticated Insecure Direct Object Reference CVE-2026-16540 5.3 Suleyman Huseynov August 6, 2026
3 Simply Schedule Appointments <= 1.6.12.10 - Unauthenticated SQL Injection CVE-2026-65508 7.5 daroo July 28, 2026
4 Simply Schedule Appointments <= 1.6.12.10 - Unauthenticated Stored Cross-Site Scripting CVE-2026-65513 7.2 whitebyte July 28, 2026
5 Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin <= 1.6.11.11 - Missing Authorization CVE-2026-59523 5.3 anhcd05 July 9, 2026
6 Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin <= 1.6.12.4 - Missing Authorization CVE-2026-57812 5.3 hio July 9, 2026
7 Simply Schedule Appointments <= 1.6.12.3 - Unauthenticated Stored Cross-Site Scripting CVE-2026-13400 7.2 Revanth Hari Narayana Matte July 6, 2026
8 Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin <= 1.6.12.2 - Unauthenticated Stored Cross-Site Scripting CVE-2026-57317 7.2 vnth4nhnt June 26, 2026
9 Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin <= 1.6.10.6 - Unauthenticated Stored Cross-Site Scripting CVE-2026-39447 7.2 devploit May 28, 2026
10 Appointment Booking Calendar <= 1.6.11.8 - Missing Authorization to Unauthenticated Arbitrary Modification via Bulk Appointments REST API Endpoint CVE-2026-6937 5.3 winrace May 27, 2026

Did you know Wordfence Intelligence provides free personal and commercial API access to our comprehensive WordPress vulnerability database, along with a free webhook integration to stay on top of the latest vulnerabilities added and updated in the database? Get started today!

Learn more

Want to get notified of the latest vulnerabilities that may affect your WordPress site?
Install Wordfence on your site today to get notified immediately if your site is affected by a vulnerability that has been added to our database.

Get Wordfence

The Wordfence Intelligence WordPress vulnerability database is completely free to access and query via API. Please review the documentation on how to access and consume the vulnerability data via API.

Documentation