{"action":"opened","issue":{"url":"https://api.github.com/repos/liberapay/liberapay.com/issues/1123","repository_url":"https://api.github.com/repos/liberapay/liberapay.com","labels_url":"https://api.github.com/repos/liberapay/liberapay.com/issues/1123/labels{/name}","comments_url":"https://api.github.com/repos/liberapay/liberapay.com/issues/1123/comments","events_url":"https://api.github.com/repos/liberapay/liberapay.com/issues/1123/events","html_url":"https://github.com/liberapay/liberapay.com/issues/1123","id":328534494,"node_id":"MDU6SXNzdWUzMjg1MzQ0OTQ=","number":1123,"title":"[HackerOne] Authenticated open redirect on liberapay.com via the back_to parameter when leaving a team.","user":{"login":"EdOverflow","id":18099289,"node_id":"MDQ6VXNlcjE4MDk5Mjg5","avatar_url":"https://avatars3.githubusercontent.com/u/18099289?v=4","gravatar_id":"","url":"https://api.github.com/users/EdOverflow","html_url":"https://github.com/EdOverflow","followers_url":"https://api.github.com/users/EdOverflow/followers","following_url":"https://api.github.com/users/EdOverflow/following{/other_user}","gists_url":"https://api.github.com/users/EdOverflow/gists{/gist_id}","starred_url":"https://api.github.com/users/EdOverflow/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/EdOverflow/subscriptions","organizations_url":"https://api.github.com/users/EdOverflow/orgs","repos_url":"https://api.github.com/users/EdOverflow/repos","events_url":"https://api.github.com/users/EdOverflow/events{/privacy}","received_events_url":"https://api.github.com/users/EdOverflow/received_events","type":"User","site_admin":false},"labels":[{"id":477630338,"node_id":"MDU6TGFiZWw0Nzc2MzAzMzg=","url":"https://api.github.com/repos/liberapay/liberapay.com/labels/Defense","name":"Defense","color":"00d500","default":false}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2018-06-01T14:09:04Z","updated_at":"2018-06-01T14:09:04Z","closed_at":null,"author_association":"MEMBER","body":"## Summary of the issue\r\n\r\nThe reporter has discovered an authenticated open redirect on liberapay.com via the `back_to` parameter when a user cancels leaving a team.\r\n\r\n## Steps to reproduce\r\n\r\n1. Navigate to a team that you are a part of on liberapay.com;\r\n2. Visit `https://en.liberapay.com/<TEAM>/membership/leave?back_to=http://example.com/`;\r\n3. Click on the \"cancel\" button.\r\n\r\nAs a result, you should be redirected to example.com.\r\n\r\n## Impact\r\n\r\nThis is a low-severity issue since it require a lot of very unlikely user interaction to be exploited successfully in practice."}}
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