PHPJabbers Appointment Scheduler 3.0 Cross Site Scripting

# Exploit Title: PHPJabbers Appointment Scheduler v3.0 - Multiple Stored XSS# Date: 19/11/2023# Exploit Author: BugsBD Limited# Discover by: Rahad Chowdhury# Vendor Homepage: https://www.phpjabbers.com/# Software Link: https://www.phpjabbers.com/appointment-scheduler/# Version: v3.0# Tested on: Windows 10, Windows 11, Linux# CVE-2023-48839Descriptions:PHPJabbers Appointment Scheduler v3.0 is vulnerable to Multiple StoredCross-Site Scripting. Multiple Stored XSS is a type of securityvulnerability that occurs when an application or website allows anattacker to inject malicious scripts into the content that ispermanently stored on the server. Unlike reflected XSS, where themalicious script is embedded in a URL and executed immediately, storedXSS involves the persistent storage of the malicious script on thetarget server, waiting for unsuspecting users to access thecompromised content.Steps to Reproduce:1. Login your panel.2. Vulnerable parameters are "name, plugin_sms_api_key,plugin_sms_country_code, calendar_id, title, country name,customer_name".3. Go to System Menu then click SMS Settings.4. Then use any XSS Payload in "SMS API Key", "Default Country Code"input field and Save.5. You will see popup.## Reproduce:[href](https://github.com/bugsbd/CVE/tree/main/2023/CVE-2023-48839)