The language file parsing process could be manipulated to expose environment variables. Environment variables might contain sensible information.
[
{
"defaultStatus": "unaffected",
"product": "Joomla! CMS",
"vendor": "Joomla! Project",
"versions": [
{
"status": "affected",
"version": "1.6.0-4.4.0"
},
{
"status": "affected",
"version": "5.0.0"
}
]
}
]