XF 1.5 Xenforo can hide other's thread, but how to make attachment still accessible to all?

#1
hello, using the forum usergroup permission, i can set "view other's thread" to "revoke" and the forum will only shows your own threads.

but this makes the attachment also only available to yourself. I wonder, how to make the attachment accessible to everybody while keeping the "view other's thread" to "revoke"?

thanks
 
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