The UCWeb UC Browser application through 2019-03-26 for Android uses HTTP to download certain modules associated with PDF and Microsoft Office files (related to libpicsel), which allows MITM attacks.
- https://www.bleepingcomputer.com/news/security/uc-browser-for-android-desktop-exposes-500-million-users-to-mitm-attacks/
No PoCs found on GitHub currently.