BigBlueButton is an open-source virtual classroom. In versions on the 3.x branch prior to 3.0.20, the string received with errorRedirectUrl lacks validation, using it directly in the respondWithRedirect function leads to an Open Redirect vulnerability. BigBlueButton 3.0.20 patches the issue. No known workarounds are available.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Thu, 05 Mar 2026 18:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:bigbluebutton:bigbluebutton:*:*:*:*:*:*:*:*

Thu, 26 Feb 2026 23:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 26 Feb 2026 13:30:00 +0000

Type Values Removed Values Added
First Time appeared Bigbluebutton
Bigbluebutton bigbluebutton
Vendors & Products Bigbluebutton
Bigbluebutton bigbluebutton

Wed, 25 Feb 2026 17:15:00 +0000

Type Values Removed Values Added
Description BigBlueButton is an open-source virtual classroom. In versions on the 3.x branch prior to 3.0.20, the string received with errorRedirectUrl lacks validation, using it directly in the respondWithRedirect function leads to an Open Redirect vulnerability. BigBlueButton 3.0.20 patches the issue. No known workarounds are available.
Title BigBlueButton has Open Redirect vulnerability in ApiController
Weaknesses CWE-601
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-02-26T21:33:41.504Z

Reserved: 2026-02-23T18:37:14.790Z

Link: CVE-2026-27736

cve-icon Vulnrichment

Updated: 2026-02-26T21:07:14.460Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-25T17:25:40.283

Modified: 2026-03-05T18:26:56.690

Link: CVE-2026-27736

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-02-26T13:15:21Z

Weaknesses