The Cybozu kintone mobile for Android 1.0.6 and earlier 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.
https://support.cybozu.com/ja-jp/article/9719
https://jvn.jp/en/jp/JVN20252219/index.html