CVE-2026-27736
MEDIUM
2026-02-25
[email protected]
6.1
CVSS 3.1
Share
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Lifecycle Timeline
3
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
Patch Released
Mar 05, 2026 - 18:26 nvd
Patch available
CVE Published
Feb 25, 2026 - 17:25 nvd
MEDIUM 6.1
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.
Analysis
Bigbluebutton versions up to 3.0.20 is affected by url redirection to untrusted site (open redirect) (CVSS 6.1).
Sign in for full analysis, threat intelligence, and remediation guidance.
Remediation
Within 30 days: Identify affected systems running versions on the 3.x branch and apply vendor patches as part of regular patch cycle. Vendor patch is available.
Sign in for detailed remediation steps.
Priority Score
31
Low
Medium
High
Critical
KEV: 0
EPSS: +0.0
CVSS: +30
POC: 0
Share
External POC / Exploit Code
Leaving vuln.today
Destination URL
POC code from unknown sources may be malicious, contain backdoors, or be fake.
Always review and test exploit code in a safe, isolated environment (VM/sandbox).
Verify the source reputation and cross-reference with known databases (Exploit-DB, GitHub Security).