CVE-2026-27736
BigBlueButton has Open Redirect vulnerability in ApiController
Vexday Risk Score
13Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 6.1EPSS 0.1%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
25 Feb 2026Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Affected products
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