Faveo Helpdesk Enterprise 6.0.1 - XSS

7.3

High

Discovered by 

Carlos Bello

Offensive Team, Fluid Attacks

Summary

Full name

Faveo Helpdesk Enterprise 6.0.1 - Privilege Escalation via Stored XSS

Code name

State

Public

Release date

Jun 23, 2023

Affected product

Faveo Helpdesk Enterprise

Affected version(s)

Version 6.0.1

Vulnerability name

Stored cross-site scripting (XSS)

Remotely exploitable

Yes

CVSS v3.1 vector string

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

CVSS v3.1 base score

7.3

Exploit available

Yes

CVE ID(s)

Description

Faveo Helpdesk Enterprise version 6.0.1 allows an attacker with agent permissions to perform privilege escalation on the application. This occurs because the application is vulnerable to stored XSS.

Vulnerability

The application allows an agent to upload HTML code when attempting to upload an image in the agent signature.


The bad thing here is that we cannot access the session cookie from JS. This is because the cookie has the HttpOnly flag. However, thanks to XSS we can perform actions on behalf of an administrator, we can create users with administrative permissions.

Exploitation

Thanks to XSS and the possibility of creating users with administrative permissions. A malicious agent can send a malicious link to the instance administrator to create an account with administrative permissions, thus managing to elevate privileges in the application.

Our security policy

We have reserved the CVE-2023-1724 to refer to this issue from now on. Disclosure policy

System Information

  • Version: Faveo Helpdesk Enterprise 6.0.1

  • Operating System: GNU/Linux

Mitigation

There is currently no patch available for this vulnerability.

References

Timeline

Vulnerability discovered

Mar 30, 2023

Vendor contacted

Mar 30, 2023

Vendor replied

Mar 30, 2023

Public disclosure

Jun 23, 2023

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Fluid Attacks' solutions enable organizations to identify, prioritize, and remediate vulnerabilities in their software throughout the SDLC. Supported by AI, automated tools, and pentesters, Fluid Attacks accelerates companies' risk exposure mitigation and strengthens their cybersecurity posture.

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