CVE-2024-13431: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin <= 1.6.8.3 - Reflected Cross-Site Scripting
Description
The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the accent_color and background parameter in all versions up to, and including, 1.6.8.3 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.
Classification
CVE ID: CVE-2024-13431
CVSS Base Severity: MEDIUM
CVSS Base Score: 6.1
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Problem Types
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Affected Products
Vendor: croixhaug
Product: Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.08% (probability of being exploited)
EPSS Percentile: 20.4% (scored less or equal to compared to others)
EPSS Date: 2025-04-05 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2024-13431https://www.wordfence.com/threat-intel/vulnerabilities/id/f6e3e5dd-b9f1-4d24-98cc-b6ab319434e4?source=cve
https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/trunk/booking-app-new/iframe-inner.php#L182
https://plugins.trac.wordpress.org/browser/simply-schedule-appointments/trunk/booking-app-new/iframe-inner.php#L189
https://plugins.trac.wordpress.org/changeset/3246760/simply-schedule-appointments/trunk/booking-app-new/iframe-inner.php