Affected versions of electron may be susceptible to a remote code execution flaw when certain conditions are met:
The electron application is running on Windows.
The electron application registers as the default handler for a protocol, such as nodeapp://.
This vulnerability is caused by a failure to sanitize additional arguments to chromium in the command line handler for Electron.
MacOS and Linux are not vulnerable.
Recommendation
Update electron to a version that is not vulnerable. If updating is not possible, the electron team has provided the following guidance:
If for some reason you are unable to upgrade your Electron version, you can append -- as the last argument when calling app.setAsDefaultProtocolClient, which prevents Chromium from parsing further options. The double dash -- signifies the end of command options, after which only positional parameters are accepted.