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[NEW] [high] BigBlueButton: Multiple Vulnerabilities

high
A remote, authenticated attacker can exploit multiple vulnerabilities in BigBlueButton to conduct a cross-site scripting attack, bypass security measures, or disclose information.

CSIRTS triage

vendor: BigBlueButtonproduct: BigBlueButtonCross-site scriptingAuthentication bypassInformation disclosure
What
Multiple vulnerabilities in BigBlueButton allow remote authenticated attackers to conduct cross-site scripting attacks, bypass security measures, or disclose information.
Who is affected
Deployments of BigBlueButton are affected; attackers must be authenticated.
Urgency
High severity; exploitation requires authentication, but XSS and security bypass enable lateral movement and data theft.
Action
Update BigBlueButton to the latest patched version immediately.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity
high
Published
2026-09-03
Exploitation
Not in CISA KEV at last sync
Language
Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-3170

Recent advisories for BigBlueButton

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from CERT-Bund (BSI) Security Advisories