Silenced user can circumvent it entering anonymous mode

ValdikSS · August 4, 2024, 1:08pm

When the user is silenced, entering anonymous mode allows to post without restrictions.
Discourse 3.3.0.beta6

ValdikSS · August 4, 2024, 1:10pm

Suspending the account which already entered anonymous mode also won’t suspend (or log out) anonymous account.

NateDhaliwal · August 4, 2024, 1:10pm

What TL is the silenced user?

ValdikSS · August 4, 2024, 1:11pm

Just tested on TL=1 test user.

NateDhaliwal · August 4, 2024, 1:11pm

What is the value for the anonymous posting allowed groups setting?

ValdikSS · August 4, 2024, 1:13pm

TL=0, everybody.

NateDhaliwal · August 4, 2024, 1:14pm

Wow, I’m surprised people won’t abuse it.

Anyway, perhaps try limiting it to a specific group which has everyone? Then remove users if you don’t want them to go anonymous mode?
Or, limit it to TL1, and demote this user to TL0?

ValdikSS · August 4, 2024, 1:15pm

Sure, I can solve the issue. I’m reporting the bug in the engine.

NateDhaliwal · August 4, 2024, 1:16pm

I see. I was just providing a workaround.

Jagster · August 4, 2024, 1:26pm

Easier? long term solution would be disabling anonymous mode from silenced users

pangbo · August 5, 2024, 1:02am

I think this issue could be fixed by adding
return if user.silenced? || user.suspended?
to

github.com

discourse/discourse/blob/2b577950af5b24ed0d32eecc4ab6475619998fba/app/services/anonymous_shadow_creator.rb#L25


      
            @user = user
          end
          
          def get_master
            return unless user
            return unless SiteSetting.allow_anonymous_posting
          
            user.master_user
          end
          
          def get
            return unless user
            return unless SiteSetting.allow_anonymous_posting
            return if !user.in_any_groups?(SiteSetting.anonymous_posting_allowed_groups_map)
            return if SiteSetting.must_approve_users? && !user.approved?
          
            shadow = user.shadow_user
          
            if shadow && (shadow.post_count + shadow.topic_count) > 0 && shadow.last_posted_at &&
                 shadow.last_posted_at < SiteSetting.anonymous_account_duration_minutes.minutes.ago
              shadow = nil

and

github.com

discourse/discourse/blob/2b577950af5b24ed0d32eecc4ab6475619998fba/app/serializers/current_user_serializer.rb#L148-L151


      
          def can_post_anonymously
            SiteSetting.allow_anonymous_posting &&
              (is_anonymous || object.in_any_groups?(SiteSetting.anonymous_posting_allowed_groups_map))
          end

By the way, I am curious as to why the permission check for can_post_anonymously is not implemented within the Guardian module.

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Silenced user can circumvent it entering anonymous mode

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