"value":"A \"data:\" URL loaded in a new tab did not inherit the Content Security Policy (CSP) of the original page, allowing for bypasses of the policy including the execution of JavaScript. In prior versions when \"data:\" documents also inherited the context of the original page this would allow for potential cross-site scripting (XSS) attacks. This vulnerability affects Firefox < 57."
}
]
},
"problemtype":{
"problemtype_data":[
{
"description":[
{
"lang":"eng",
"value":"data: URLs opened in new tabs bypass CSP protections"