BigBlueButton is an open-source virtual classroom. BigBlueButton prior to version 2.6.0-beta.1 has a path traversal vulnerability that allows an attacker with a valid starting folder path, to traverse and read other files without authentication, assuming the files have certain extensions (txt, swf, svg, png). In version 2.6.0-beta.1, input validation was added on the parameters being passed and dangerous characters are stripped. There are no known workarounds.
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/42xxx/CVE-2023-42804.json",
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-22"
]
}{
"cpe": "cpe:2.3:a:bigbluebutton:bigbluebutton:*:*:*:*:*:*:*:*",
"source": [
"AFFECTED_FIELD",
"CPE_RANGE"
],
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "2.6.0-beta.1"
},
{
"last_affected": "2.5.18"
}
]
}