The rConfig 3.9.4 is vulnerable to cross-site scripting. The devicemgmnt.php file improperly validates the request coming from the user input. Due to this flaw, An attacker can exploit this vulnerability by crafting arbitrary javascript in deviceId
GET parameter of devicemgmnt.php resulting in execution of the javascript.
View the template here CVE-2020-12256.yaml
References:
https://gist.github.com/farid007/8855031bad0e497264e4879efb5bc9f8