SugarCRM <= 12.2.0 (Notes) Unrestricted File Upload Vulnerability

• 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.

• Other References: