phpFox <= 4.8.13 (redirect) PHP Object Injection Vulnerability
• Software Link:
• Affected Versions:
Version 4.8.13 and prior versions.
• Vulnerability Description:
User input passed through the “url” request parameter to the /core/redirect route is not properly sanitized before being used in a call to the unserialize() PHP function. This can be exploited by remote, unauthenticated attackers to inject arbitrary PHP objects into the application scope, allowing them to perform a variety of attacks, such as executing arbitrary PHP code.
• Proof of Concept:
https://karmainsecurity.com/pocs/CVE-2023-46817.php
• Solution:
Upgrade to version 4.8.14 or later.
• Disclosure Timeline:
[05/10/2023] – Vendor contacted through https://clients.phpfox.com
[05/10/2023] – Vendor response stating “we currently do not have such security requirements”
[06/10/2023] – CVE identifier requested
[09/10/2023] – Vulnerability details shared with the vendor, stating the issue is quite critical
[17/10/2023] – Vendor contacted again, asking for an update
[18/10/2023] – Vendor response stating “this issue is fixed in our latest version (4.8.13)”, but that’s not the truth
[26/10/2023] – Version 4.8.14 released
[27/10/2023] – CVE identifier assigned
[27/10/2023] – Public disclosure
• CVE Reference:
The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2023-46817 to this vulnerability.
• Credits:
Vulnerability discovered by Egidio Romano.