Element Android is an Android Matrix Client. Element Android version 1.4.3 through 1.6.10 is vulnerable to intent redirection, allowing a third-party malicious application to start any internal activity by passing some extra parameters. Possible impact includes making Element Android display an arbitrary web page, executing arbitrary JavaScript; bypassing PIN code protection; and account takeover by spawning a login screen to send credentials to an arbitrary home server. This issue is fixed in Element Android 1.6.12. There is no known workaround to mitigate the issue.
The product establishes a communication channel to (or from) an endpoint for privileged or protected operations, but it does not properly ensure that it is communicating with the correct endpoint.
Attackers might be able to spoof the intended endpoint from a different system or process, thus gaining the same level of access as the intended endpoint. While this issue frequently involves authentication between network-based clients and servers, other types of communication channels and endpoints can have this weakness.