An incorrect implementation of "XEP-0280: Message Carbons" in multiple XMPP clients allows a remote attacker to impersonate any user, including contacts, in the vulnerable application's display. This allows for various kinds of social engineering attacks. This CVE is for yaxim and Bruno (0.8.6 - 0.8.8; Android).
https://rt-solutions.de/wp-content/uploads/2017/02/CVE-2017-5589_xmpp_carbons.pdf
https://rt-solutions.de/en/2017/02/CVE-2017-5589_xmpp_carbons/
https://github.com/ge0rg/yaxim/commit/65a38dc77545d9568732189e86089390f0ceaf9f