The XMLUI feature in DSpace before 3.6, 4.x before 4.5, and 5.x before 5.5 allows directory traversal via the themes/ path in an attack with two or more arbitrary characters and a colon before a pathname, as demonstrated by a themes/Reference/aa:etc/passwd URI.
{
"versions": [
{
"introduced": "0"
},
{
"fixed": "3.6"
},
{
"introduced": "4.0"
},
{
"fixed": "4.5"
},
{
"introduced": "5.0"
},
{
"fixed": "5.5"
}
]
}