Improper access control vulnerability in goo blog App for Android ver.1.2.25 and earlier and for iOS ver.1.3.3 and earlier allows a remote attacker to lead a user to access an arbitrary website via the vulnerable App.
https://jvn.jp/en/jp/JVN91691168/index.html
https://blog.goo.ne.jp/staffblog/e/d84a6b220222462094728301782885db