For future reference please send security issues you find to email@example.com.
Hope I won't 🙂
But here at NodeBB, the facebook share works fine, the popup window shows topic's contents... (using the same browser)
I am wondering, is't my environment's issue or a bug ? any clue ?
@julian thanks for the hint~
Not sure why, but after update NodeBB source code, it works fine, thanks~!!