Able to access private files when logged in with a different account/provider, which has not been granted access

I appear to be able to read, and overwrite files with a PUT, files in a private folder when logged in to a different account.

The example I found is editing https://andydavison.inrupt.net/private/test.jpg when logged in with https://ldp.demo-ess.inrupt.com/andydavison/. According to the ‘Your storage’ tab at https://andydavison.inrupt.net/, that private folder is not shared with anyone else, and indeed is inaccessible when logged out from both providers.

使用两个提供商 URL 重现报告的访问行为，在以另一个账户登录时，检查对私有 test.jpg 文件的读取和 PUT 请求。跟踪跨提供商访问的授权路径，并验证没有共享权限的账户既不能读取也不能覆盖该私有文件。