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CMSuno 1.7 Cross Site Scripting

CVE Category Price Severity
CVE-2021-36654 CWE-79 $500 High
Author Risk Exploitation Type Date
Unknown High Remote 2021-08-06
CVSS EPSS EPSSP
CVSS:4.0/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L 0.02192 0.50148

CVSS vector description

Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2021080020

Below is a copy:

CMSuno 1.7 Cross Site Scripting
# Exploit Title: CMSuno 1.7 - 'tgo' Stored Cross-Site Scripting (XSS) (Authenticated)
# Date: 03-08-2021
# Exploit Author: splint3rsec
# Vendor Homepage: https://github.com/boiteasite
# Software Link: https://github.com/boiteasite/cmsuno
# Affected Version(s): CMSuno 1.7 (and prior)
# CVE : CVE-2021-36654

CMSuno version 1.7 and prior is vulnerable to a stored cross-site scripting.

The attacker must be authenticated to exploit the vulnerability.

The payload injection is done while updating the template's image filename, vulnerable parameter is *tgo*

Steps to reproduce:

1. Go to /uno.php and click on *plugins*
2. Click on *Logo*
3. Choose a random picture in your files repo, click on save and intercept the request
4. Edit the POST request to /uno/template/uno1/uno1.php by modifying the tgo parameter's value to ")}</style><script>VULN JS CODE HERE</script>
5. Forward the request and click on *publish*
6. Click on *See the website*
7. XSS

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