CVE-2026-27736
BigBlueButton has Open Redirect vulnerability in ApiController
- State
- Published
- Severity
- 6.1 Medium
- Published
- Feb 25, 2026
- Updated
- Feb 26, 2026
- Reserved
- Feb 23, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.1 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N | GitHub_M |
Weaknesses
- CWE-601 URL Redirection to Untrusted Site ('Open Redirect')
Affected Products
| Product | Versions |
|---|---|
bigbluebuttonbigbluebutton |
|
References
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