CVE-2022-23047: Exponent CMS 2.6.0 patch2 - Stored XSS | Fluid Attacks

Summary

Name

Exponent CMS 2.6.0 patch2 - Stored XSS

Code name

Franklin

Product

Exponent CMS

Affected versions

v2.6.0 patch2

State

Public

Release Date

2022-02-03

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-2022-23047

Description

Exponent CMS 2.6.0 patch2 allows an authenticated admin user to inject persistent javascript code inside the Site/Organization Name,Site Title and Site Header parameters while updating the site settings on http://127.0.0.1/exponentcms/administration/configure_site.

Proof of Concept

1. Click on the Exponent logo located on the upper left corner.

2. Go to 'Configure Website’.

3. Update the ‘Site Title’ field or any of the vulnerable fields with the following PoC.

   Exponent CMS" onmouseover=alert('xss')>
   

4. If a user hover the mouse over the logo or visits the ‘Configure Website’ the XSS will be triggered.

System Information:

• Version: Exponent CMS 2.6.0 patch2.
• 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 2022-02-03 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.exponentcms.org/

Ticket

https://exponentcms.lighthouseapp.com/projects/61783/tickets/1459

Issue

https://github.com/exponentcms/exponent-cms/issues/1546

Timeline

• 2022-01-24: Vulnerability discovered.

• 2022-01-24: Vendor contacted.

• 2022-02-03: Public Disclosure.