The 7-ELEVEN (aka ecowork.seven) application 2.08.000 for Android does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.

An unauthenticated attacker within BLE proximity can remotely connect to a 7-Eleven LED Message Cup, Hello Cup 1.3.1 for Android, and bypass the application's client-side chat censor filter.