SugarCRM <= 12.2.0 (Notes) Unrestricted File Upload Vulnerability

[-] Software Link:

[-] Affected Versions:

Version 12.2.0 and prior versions.
Version 12.0.2 and prior versions.
Version 11.0.5 and prior versions.

[-] Vulnerability Description:

When handling the "save" action within the "Notes" module the 
application allows uploading
of any kind of file into the /upload/ directory. This one is protected 
by the main SugarCRM
.htaccess file, i.e. it doesn't allow access/execution for PHP files. 
However, this behaviour
can be overridden if a subdirectory contains another .htaccess file. So, 
an attacker can
leverage the vulnerability to firstly upload a new .htaccess file and 
then to upload the
PHP code they want to execute.

[-] Proof of Concept:

[-] Solution:

Upgrade to version 12.3.0, 12.0.3, 11.0.6, or later.

[-] Disclosure Timeline:

[14/02/2023] - Vendor notified
[12/04/2023] - Fixed versions released
[17/06/2023] - CVE number assigned
[23/08/2023] - Publication of this advisory

[-] CVE Reference:

The Common Vulnerabilities and Exposures project (
has assigned the name CVE-2023-35808 to this vulnerability.

[-] Credits:

Vulnerability discovered by Egidio Romano.

[-] Original Advisory:

[-] Other References: