CMS Made Simple SQL injection on m1_sortby parameter

[riccardo krauter <riccardo.krauter () gmail com>]

1) Summary

Affected software  CMS Made Simple-2.2.15
Vendor URLhttp://www.cmsmadesimple.org/  <http://www.cmsmadesimple.org/>
Vulnerability      SQL injection

2) Vulnerability Description

The affected software is vulnerable to SQL injection via the m1_sortby POST parameter of the News module, reachable via 
the moduleinterface.php page.
The `sortby` parameter is sanitized by replacing the `'` with the `_` character, anyway it is possible to inject arbitrary 
SQL language without using the `'`.
This vulnerability is remotely exploitable and require authentication.
 
3) PoC and details

https://github.com/beerpwn/CVE/blob/master/cms_made_simple_2021/sqli_order_by/CMS-MS-SQLi-report.md

4) Credits

This vulnerability has been discovered and reported
by Riccardo Krauter researcher @ Soter IT Security (soteritsecurity.com).

5) Timeline

2021/02/22  Vendor was informed
2021/02/26  Vendor said he won't fix
2021/03/17  Public disclosure


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