An issue was discovered in Moodle 3.x. Students who posted on forums and exported the posts to portfolios can download any stored Moodle file by changing the download URL.
{
"versions": [
{
"introduced": "3.1.0"
},
{
"last_affected": "3.1.11"
},
{
"introduced": "3.2.0"
},
{
"last_affected": "3.2.8"
},
{
"introduced": "3.3.0"
},
{
"last_affected": "3.3.5"
},
{
"introduced": "3.4.0"
},
{
"last_affected": "3.4.2"
}
]
}