A missing link validation in Nextcloud Server before 20.0.2, 19.0.5, 18.0.11 allows execution of a stored XSS attack using Internet Explorer when saving a 'javascript:' URL in markdown format.
{
"versions": [
{
"introduced": "0"
},
{
"fixed": "18.0.11"
},
{
"introduced": "19.0.0"
},
{
"fixed": "19.0.5"
},
{
"introduced": "20.0.0"
},
{
"fixed": "20.0.2"
}
]
}