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TI-2024-25753 Aliases CVE-2024-38518

bbb-web API additional parameters considered

Priority LOW 21CWE-284Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
Low · None · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-284.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00307 23rd percentileScored 2026-11-07
Fix Fixed bigbluebutton (bigbluebutton): 2.6.18, 2.7.8, 3.0.0-alpha.7

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
bigbluebuttonbigbluebuttonbefore 2.6.18; 2.7.0 to before 2.7.8; 2.8.0 to before 3.0.0-alpha.72.6.18, 2.7.8, 3.0.0-alpha.7Patch availableCNA
  • bigbluebutton Vendorbigbluebutton Affected before 2.6.18; 2.7.0 to before 2.7.8; 2.8.0 to before 3.0.0-alpha.7 Fixed in 2.6.18, 2.7.8, 3.0.0-alpha.7 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:bigbluebutton:bigbluebutton:*:*:*:*:*:*:*:*——bigbluebutton
  • cpe:2.3:a:bigbluebutton:bigbluebutton:*:*:*:*:*:*:*:* Versions — — ·bigbluebutton

Remediation

  • Fix · CNA bigbluebutton (bigbluebutton) Fixed in 2.6.18, 2.7.8, 3.0.0-alpha.7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-38518

References

Other 4

  • TI-2026-21873 BigBlueButton: Exposed ClamAV port enables Denial of Service CVSS 3.1HIGH 8.2
  • TI-2025-38047 BigBlueButton vulnerable to Chat DoS via invalid reactionEmojiId CVSS 3.1HIGH 7.5
  • TI-2025-38046 BigBlueButton vulnerable to DoS via PollSubmitVote GraphQL mutation CVSS 3.1HIGH 7.5
  • TI-2022-13109 Cross site scripting in username that will trigger by sending chat CVSS 3.1MEDIUM 6.5
  • TI-2020-09954 BigBlueButton before 2.2.6 allows remote attackers to read arbitrary files because the… CVSS 3.1CRITICAL 9.8
  • TI-2022-16454 BigBlueButton Greenlight Open Redirect vulnerability CVSS 3.1CRITICAL 9.1
See all 66 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences