nextcloud / nextcloud/circles

Filenames shared via Secret Circle visible to all users in Activity stream

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#168 6 comments 2 reactions 0 assignees View on GitHub

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0. Needs triage bug security
Dominant language
JavaScript
Stars
177
Forks
68
Avg merge
2d 22h
Merged PRs (30d)
60

Description

One of the users on my instance noticed that the metadata (file name and who shared it and on which circle) of the files he shared on his secret circle can be viewed by anyone making the circle not secret anymore and leaking potentially private data.
I think activities on both Secret and Private circles should not be shown to anyone but the members of the circle.

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Research direction

No file or test is named. Start by tracing how Secret and Private circle shares appear in the Activity stream, then inspect the visibility checks for circle membership. Done means filenames, sharer information, and circle details are visible only to members of the relevant circle, with regression coverage for both circle types.

Written by the indexing model from the issue text.

Assessment

Tech stack
javascript
Domain
authorization, security
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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