The Max messenger, developed by VK, has significant user tracking capabilities. A report from InterSecLab revealed that:
- Max's features can vary for individual users without app updates.
- It lacks end-to-end encryption, allowing VK access to messages, even in "secret chats."
- Each account can be configured to perform specific actions, such as decrypting messages on VK's servers and blocking messages if a VPN is detected.
- Upon launching, Max reports the user’s network environment to VK, including their public IP address and mobile carrier.
- The app uploads users’ entire address books unencrypted to VK's servers, accessing contacts of non-registered individuals.
- A phone number query can reveal extensive user information without notification.
- Max stops functioning if it detects a VPN, requiring users to disable it to send messages, although workarounds exist.
- New users receive a curated list of recommended channels, primarily featuring state media and pro-government figures.