Mattermost · Report #1442017
Self XSS in Create New Workspace Screen
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