See how viber compares to other vendors in security performance
Viber for iOS through 29.4.0.24 fails to validate the logical screen width and height in received GIF headers, allowing attackers to crash the app. Attackers can send a crafted GIF with zero dimensions that triggers an uncaught NSInternalInconsistencyException, aborting the app with SIGABRT when opened.
Viber Desktop 25.6.0 is vulnerable to HTML Injection via the text parameter of the message compose/forward interface