MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2 has XSS when the $wgShowExceptionDetails setting is false and the browser sends non-standard URL escaping.
{
"versions": [
{
"introduced": "0"
},
{
"last_affected": "1.27.3"
},
{
"introduced": "0"
},
{
"last_affected": "1.28.0"
},
{
"introduced": "0"
},
{
"last_affected": "1.28.1"
},
{
"introduced": "0"
},
{
"last_affected": "1.28.2"
},
{
"introduced": "0"
},
{
"last_affected": "1.29.0"
},
{
"introduced": "0"
},
{
"last_affected": "1.29.1"
}
]
}