BigBlueButton Stored Cross-site Scripting vulnerability at Guest Lobby
CVE-2023-43797

6.3MEDIUM

Key Information:

Vendor

Bigbluebutton

Status
Bigbluebutton
Vendor
CVE Published:
30 October 2023

What is CVE-2023-43797?

BigBlueButton is an open-source virtual classroom. Prior to versions 2.6.11 and 2.7.0-beta.3, Guest Lobby was vulnerable to cross-site scripting when users wait to enter the meeting due to inserting unsanitized messages to the element using unsafe innerHTML. Text sanitizing was added for lobby messages starting in versions 2.6.11 and 2.7.0-beta.3. There are no known workarounds.

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Affected Version(s)

bigbluebutton < 2.6.11 < 2.6.11

bigbluebutton >= 2.7.0-alpha.1, < 2.7.0-beta.3 < 2.7.0-alpha.1, 2.7.0-beta.3

References

https://github.com/bigbluebutton/bigbluebutton/security/a...
x_refsource_CONFIRM
https://github.com/bigbluebutton/bigbluebutton/pull/18392
x_refsource_MISC
https://github.com/bigbluebutton/bigbluebutton/commit/304...
x_refsource_MISC

CVSS V3.1

Score:
6.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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