Tiki Wiki CMS Groupware <= 24.0 (structlib.php) PHP Code Injection Vulnerability

• Software Link:

• Affected Versions:

Version 24.0 and prior versions.

• Vulnerability Description:

The vulnerability is located in the /lib/structures/structlib.php script, specifically in the StructLib::structure_to_webhelp() method, which is using an eval() call with user-controlled input. This can be exploited by malicious users to inject and execute arbitrary PHP code. Successful exploitation of this vulnerability requires the “feature_create_webhelp” to be enabled and an account with permissions to create a wiki page.

• Solution:

Upgrade to version 24.1 or later.

• Disclosure Timeline:

[08/03/2022] – Vendor notified

[23/08/2022] – Version 24.1 released

[09/01/2023] – Public disclosure

• CVE Reference:

The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2023-22853 to this vulnerability.

• Credits:

Vulnerability discovered by Egidio Romano.