Open Redirection into Bentley System

Amit Kumar Biswas @Amitlt2
2 min readApr 21, 2022

Hello, Hackers Welcome to another write-up where I have shared a scenario of Open Redirection…

Let's understand what is open redirection vulnerability:

An Open Redirection is when a web application or server uses a user-submitted link to redirect the user to a given website or page. Even though it seems like a harmless action, to let a user decide on which page he wants to be redirected to if exploited such a technique can have a serious impact, especially when combined with other vulnerabilities and tricks.

During my testing, I discovered a subdomain and I just search on google but was not able to find anything….:(

I just open paramspider and fuzz for parameters suddenly I came out with one parameter which is post redirect URI path which is vulnerable to open redirection.

Affected Uri:- *.bentley.com/connect/endsession?post_logout_redirect_uri=https://attacker.com

post_logout_redirect_uri= is vulnerable

Understand the impact of open redirection

A user will be triggered by XSS attacks.

Phishing Attack.

Shared a Video Proof of Concept where you’ll be able to understand the attack.

Youtube:- https://youtu.be/mGePGEVT3XU

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Amit Kumar Biswas @Amitlt2

Cyber Security Analyst at @avalanceGlobalSolutions | Security Researcher in | Cyber Security Researcher in Microsoft & Bugcrowd | R&D in Smart Contract |