CVE-2023-43797

MEDIUM EPSS 33.5%
Published Oct 30, 20232y ago · Modified Jun 17, 20262w ago
5.4 CVSS 3.1
Medium
Find Similar
Published Oct 30, 2023 2y ago
Last Modified Jun 17, 2026 2w ago

Description

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.

CVSS Details

Base Score
5.4
Exploitability
2.3
Impact
2.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction Required
Scope Changed
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
33.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

Affected Products 6

VendorProductVersionRange
bigbluebuttonbigbluebutton* <2.6.11
bigbluebuttonbigbluebutton2.7.0any
bigbluebuttonbigbluebutton2.7.0any
bigbluebuttonbigbluebutton2.7.0any
bigbluebuttonbigbluebutton2.7.0any
bigbluebuttonbigbluebutton2.7.0any

References 3

  • github.com https://github.com/bigbluebutton/bigbluebutton/commit/304bc851a00558f99a908880f4ac44234a074c9d
    PatchThird Party Advisory
  • github.com https://github.com/bigbluebutton/bigbluebutton/pull/18392
    Third Party Advisory
  • github.com https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-v6wg-q866-h73x
    Third Party Advisory

Remediation

  • github.com https://github.com/bigbluebutton/bigbluebutton/commit/304bc851a00558f99a908880f4ac44234a074c9d
    PatchThird Party Advisory