HexBrain

Mattermost · Report #1442017

Self XSS in Create New Workspace Screen

Validstatus
lowseverity
42upvotes
20 Feb 2022disclosed

How it was found

Hi team, I have found an vulnerability on your website . step to reproduce :

1.firstly i want to say sorry for this .please read carefully when im testing on your website .i was redirected to : https://customers.mattermost.com/cloud/connect-workspace 2.then navigate to create new workspace 3.on workspace name input this payload : "/><img src=x onerror=alert(document.cookie)> 4.xss will trigger

I know this domain is in out of scope ,but attacker can steal user cookies . I dont want any rewards for this i just want to aware you guys for this vulnerability .Hope you can understand . Thanks for reading my report

Impact

attacker can steal user cookies

This report was disclosed publicly on HackerOne and belongs to its author and the program. See the original