PHP Server Monitor v3.5.2 - Stored XSS

Summary

Name	PHP Server Monitor v3.5.2 - Stored XSS
Code name	Gilmour
Product	PHP Server Monitor
Affected versions	v3.5.2
State	Public
Release date	2022-03-07

Vulnerability

Kind	Stored cross-site scripting (XSS)
Rule	010. Stored cross-site scripting (XSS)
Remote	Yes
CVSSv3 Vector	CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
CVSSv3 Base Score	4.8
Exploit available	No
CVE ID(s)	CVE-2022-23044

Description

PHP Server Monitor v3.5.2 allows an authenticated admin user to inject Javascript code inside the "ip" parameter while adding a new website to monitor.

Proof of Concept

Steps to reproduce

1. Go to the 'Servers' tab.

2. Click on 'Add new'.

3. Fill the 'Label' field.

4. Select 'Website' as the type.

5. Fill the 'Domain/IP' field using one of the following POCs.

       https://www.example.com" onmouseover=alert(1)>
       https://www.example.com" style="display: block; position: fixed; top: 0; left: 0; z-index: 99999; width: 9999px; height: 9999px;" onmouseover=alert('XSS')> (To avoid user interaction)
   

6. The javascript code will be executed when a user visits the 'Servers' tab again.

System Information

• Version: PHP Server Monitor v3.5.2.
• Operating System: Linux.
• Web Server: Apache
• PHP Version: 7.4
• Database and version: Mysql

Exploit

There is no exploit for the vulnerability but can be manually exploited.

Mitigation

By 2022-03-07 there is not a patch resolving the issue.

Credits

The vulnerability was discovered by Oscar Uribe from the Offensive Team of Fluid Attacks.

References

Vendor page https://www.phpservermonitor.org/

Issue https://github.com/phpservermon/phpservermon/issues/1178

Timeline