CVE-2024-38518

bbb-web API additional parameters considered

MEDIUM
4.6
CVSS Score
Published: June 28, 2024 at 08:25 PM UTC
Updated: June 17, 2026 at 07:40 AM UTC
1 product affected across 1 vendorBigbluebutton

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Severity
MEDIUM4.6
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 2.6.18v < 2.7.8v < 3.0.0-alpha.7
Affected range stops below 2.6.18, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.7.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.0.0-alpha.7, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.6MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-284

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