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cmfcmf avatar cmfcmf commented on June 7, 2024 2

One thing to be careful about is making sure to correctly handle users entering http://127.0.0.1/..., http://localhost/..., 192.168.0.123/..., etc. as link. If we blindly call https://localhost/... from our server, we might be executing unintended actions at internal system resources, such as ElasticSearch.

Edit: Users could even provide a link http://malicious.com/... and set up the DNS to point to 127.0.0.1.

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cmfcmf avatar cmfcmf commented on June 7, 2024

We could also simply forbid HTTP thumbnail images, given that almost every website uses HTTPS anyways. This might be the easiest fix for this issue.

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