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

[-] 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 (
has assigned the name CVE-2023-22853 to this vulnerability.

[-] Credits:

Vulnerability discovered by Egidio Romano.

[-] Original Advisory: