In this walk through, we will be going through the Application Log Injection (Login) vulnerability section from Mutillidae Labs. We will be exploring and exploiting Application Log Injection in Login Panel and learn how application are affected because of it. So, let’s get started with the Hacking without any delay.

Table of Contents
Security Level: 0 (Hosed)
- Setting the security level to 0 or Hosed.

- The application has a login functionality. We have already bypassed it in SQL injection section. Let’s try to run code on the client side.

- I used the below payload to execute a pop-up alert.
<script>alert(1)</script>;


Also Read: Mutillidae – Application Log Injection (DNS Lookup)
Conclusion:

So, we finally completed all the security levels for the Mutillidae Application Log Injection (Login) Vulnerability. We looked into the various ways how application has been set up in various levels and how we can bypass the security controls implemented. Next, we can mitigate the potential Application Log Injection attacks by performing input sanitization on endpoints, whitelist the allowed characters in the input and using a WAF. Along with that, we can prevent data from any untrusted source to be dynamically written to the HTML document. On that note, i will take your leave and will meet you in next one with another Mutillidae vulnerability writeup, till then “Keep Hacking”.