BigBlueButton contains DoS via failed authToken validation
BigBlueButton is an open source web conferencing system. Versions prior to 2.4.3, are subject to Insufficient Verification of Data Authenticity, resulting in Denial of Service. An attacker can make a Meteor call to `validateAuthToken` using a victim's userId, meetingId, and an invalid authToken. This forces the victim to leave the conference, because the resulting verification failure is also observed and handled by the victim's client. The attacker must be a participant in any meeting on the server. This issue is patched in version 2.4.3. There are no workarounds.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2022-41960
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 13:51 UTC · Revision 1
Source evidence
BigBlueButton contains DoS via failed authToken validation
core-osv · Original sourcePublished 15 Dec 2022, 23:56 UTC
BigBlueButton is an open source web conferencing system. Versions prior to 2.4.3, are subject to Insufficient Verification of Data Authenticity, resulting in Denial of Service. An attacker can make a Meteor call to `validateAuthToken` using a victim's userId, meetingId, and an invalid authToken. This forces the victim to leave the conference, because the resulting verification failure is also observed and handled by the victim's client. The attacker must be a participant in any meeting on the server. This issue is patched in version 2.4.3. There are no workarounds.
osv:CVE-2022-41960
Complete source record
{
"id": "c743aa508de1ba47d1f730c6a85a96182566ccc6e32c3368eb5e57ba49c56a79",
"url": "https://osv.dev/vulnerability/CVE-2022-41960",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "BigBlueButton contains DoS via failed authToken validation",
"summary": "BigBlueButton is an open source web conferencing system. Versions prior to 2.4.3, are subject to Insufficient Verification of Data Authenticity, resulting in Denial of Service. An attacker can make a Meteor call to `validateAuthToken` using a victim's userId, meetingId, and an invalid authToken. This forces the victim to leave the conference, because the resulting verification failure is also observed and handled by the victim's client. The attacker must be a participant in any meeting on the server. This issue is patched in version 2.4.3. There are no workarounds.",
"evidence": "osv:CVE-2022-41960",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2022-41960",
"aliases": [
"CVE-2022-41960",
"GHSA-rgjp-3r74-g4cm"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/bigbluebutton/bigbluebutton",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "e7773468fb45d86200ae28bdf8c39f4ba487cf88"
},
{
"fixed": "60302d3e353cea201fbd02912302d7f040f0dc27"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:bigbluebutton:bigbluebutton:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "2.4.3"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "e7773468fb45d86200ae28bdf8c39f4ba487cf88"
}
],
"source": "REFERENCES_TAG",
"original_tag": "v2.4.3"
},
{
"range": [
{
"fixed": "60302d3e353cea201fbd02912302d7f040f0dc27"
}
],
"source": "REFERENCES_TAG",
"original_tag": "v2.5-alpha-1"
}
]
}
}
],
"versions": [
"v2.4.2",
"v2.4.1",
"v2.4.0",
"v2.4-rc-7",
"v2.4-rc-6",
"v2.4-rc-5",
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"v2.4-beta-3",
"v2.4-beta-2",
"v2.4-beta-1",
"v2.4-alpha-1",
"v2.3.1",
"v2.3.0",
"v2.3-rc-2",
"v2.3-rc-1",
"v2.3-beta-5",
"v2.3-beta-4",
"v2.3-beta-3",
"v2.3-beta-2",
"v2.3-beta-1",
"v2.3-alpha-8",
"v2.3-alpha-7",
"v2.3-alpha-6",
"v2.3-alpha-5",
"v2.3-alpha-4",
"v2.3-alpha-3",
"v2.3-alpha-2",
"v2.3-alpha-1",
"2.2-rc-3",
"2.2-rc-2",
"2.2-rc-1",
"2.2-beta-23",
"2.2-beta-22",
"2.2-beta-21",
"2.2-beta-20",
"2.2-beta-19",
"2.2-beta-18",
"2.2-beta-17",
"2.2-beta-16",
"2.2-beta-15",
"2.2-beta-14",
"2.2-beta-12",
"2.2-beta-11",
"2.2-beta-10",
"2.2-beta-9",
"2.2-beta-8",
"2.2-beta-7",
"2.2-beta-6",
"2.2-beta-5",
"2.2-beta-4",
"2.2-beta-3",
"2.2-beta-2",
"dcs-2-a",
"v0.9.0-beta",
"v0.8",
"v0.8rc2",
"v0.8b4.0",
"v0.8b4"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-41960.json"
}
}
],
"modified": "2026-10-28T02:30:29.331732611Z",
"provider": "osv",
"references": [
"https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4.3",
"https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.5-alpha-1",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/41xxx/CVE-2022-41960.json",
"https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-rgjp-3r74-g4cm",
"https://nvd.nist.gov/vuln/detail/CVE-2022-41960"
],
"provider_metadata": {
"cwe_ids": [
"CWE-345"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/41xxx/CVE-2022-41960.json"
}
},
"related_cves": [
{
"value": "CVE-2022-41960",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 496094,
"published_at": "2022-12-15T23:56:26.5+00:00"
}