In Eclipse Theia 0.1.1 to 0.2.0, it is possible to exploit the default build to obtain remote code execution (and XXE) via the theia-xml-extension. This extension uses lsp4xml (recently renamed to LemMinX) in order to provide language support for XML. This is installed by default.
[
{
"product": "Eclipse Theia",
"vendor": "The Eclipse Foundation",
"versions": [
{
"status": "affected",
"version": "0.1.1"
},
{
"status": "affected",
"version": "0.1.2"
},
{
"status": "affected",
"version": "0.2.0-next.28bc2735"
},
{
"status": "affected",
"version": "0.2.0-next.41406d98"
},
{
"status": "affected",
"version": "0.2.0-next.a2958907"
}
]
}
]