Medium
bbb-web API additional parameters considered
Type: advisorySources: OSV
BigBlueButton is an open-source virtual classroom designed to help teachers teach and learners learn. An attacker with a valid join link to a meeting can trick BigBlueButton into generating a signed join link with additional parameters. One of those parameters may be "role=moderator", allowing an attacker to join a meeting as moderator using a join link that was originally created for viewer access. This vulnerability has been patched in version(s) 2.6.18, 2.7.8 and 3.0.0-alpha.7.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2024-38518
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 7 Nov 2026, 12:23 UTC · Revision 1
Source evidence
bbb-web API additional parameters considered
core-osv · Original sourcePublished 28 Jun 2024, 20:25 UTC
BigBlueButton is an open-source virtual classroom designed to help teachers teach and learners learn. An attacker with a valid join link to a meeting can trick BigBlueButton into generating a signed join link with additional parameters. One of those parameters may be "role=moderator", allowing an attacker to join a meeting as moderator using a join link that was originally created for viewer access. This vulnerability has been patched in version(s) 2.6.18, 2.7.8 and 3.0.0-alpha.7.
osv:CVE-2024-38518
Complete source record
{
"id": "abb5ab92ef1f1f1c6d1d3fa964ee45713903ee39374ec4c9cea2e01cde5a9ada",
"url": "https://osv.dev/vulnerability/CVE-2024-38518",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "bbb-web API additional parameters considered",
"summary": "BigBlueButton is an open-source virtual classroom designed to help teachers teach and learners learn. An attacker with a valid join link to a meeting can trick BigBlueButton into generating a signed join link with additional parameters. One of those parameters may be \"role=moderator\", allowing an attacker to join a meeting as moderator using a join link that was originally created for viewer access. This vulnerability has been patched in version(s) 2.6.18, 2.7.8 and 3.0.0-alpha.7.",
"evidence": "osv:CVE-2024-38518",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2024-38518",
"aliases": [
"CVE-2024-38518",
"GHSA-4m48-49h7-f3c4"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/bigbluebutton/bigbluebutton",
"type": "GIT",
"events": [
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"introduced": "0"
},
{
"fixed": "c4e7f85820f267a4ef4424193c9d0d7b3d2338e4"
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{
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{
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{
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}
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"database_specific": {
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"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
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{
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{
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{
"range": [
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}
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"source": "REFERENCES_COMMIT"
},
{
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{
"fixed": "ea6e9461dceae8fa593543d8c686f77bb8677e72"
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],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
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"v2.6.0-rc.6",
"v2.6.0-rc.4",
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"v2.6.0-rc.1",
"v2.6.0-rc.3",
"v2.6.0-rc.2",
"v2.6.0-beta.7",
"v2.6.0-beta.6",
"v2.6.0-beta.5",
"v2.6.0-beta.4",
"v2.6.0-beta.3",
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"2.2-beta-16",
"2.2-beta-15",
"2.2-beta-14",
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"2.2-beta-4",
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"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-2024-38518.json"
}
}
],
"modified": "2026-10-28T02:30:50.720826525Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/38xxx/CVE-2024-38518.json",
"https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-4m48-49h7-f3c4",
"https://nvd.nist.gov/vuln/detail/CVE-2024-38518",
"https://github.com/bigbluebutton/bigbluebutton/commit/a9d436accdcd26ea66bed9f391488ac128cd62d1",
"https://github.com/bigbluebutton/bigbluebutton/commit/ea6e9461dceae8fa593543d8c686f77bb8677e72",
"https://github.com/bigbluebutton/bigbluebutton/pull/20279"
],
"provider_metadata": {
"cwe_ids": [
"CWE-284"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/38xxx/CVE-2024-38518.json"
}
},
"related_cves": [
{
"value": "CVE-2024-38518",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 519272,
"published_at": "2024-06-28T20:25:40.743+00:00"
}