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Vulnerabilities

CVE-2026-27467

Low
BigBlueButton is an open-source virtual classroom. In versions 3.0.19 and below, when first joining a session with the microphone muted, the client sends audio to the server regardless of mute state.
CWE-200 — Weakness Type
Published: Feb 21, 2026  ·  Modified: Feb 28, 2026  ·  Source: NVD
CVSS v3
2.0
🔗 NVD Official
📄 Description (English)

BigBlueButton is an open-source virtual classroom. In versions 3.0.19 and below, when first joining a session with the microphone muted, the client sends audio to the server regardless of mute state. Media is discarded at the server side, so it isn't audible to any participants, but this may allow for malicious server operators to access audio data. The behavior is only incorrect between joining the meeting and the first time the user unmutes. This issue has been fixed in version 3.0.20.

🤖 AI Executive Summary

BigBlueButton versions 3.0.19 and below leak audio data to the server when users join with microphone muted, though the audio is discarded server-side. This vulnerability only affects the period between joining and first unmute, and has been patched in version 3.0.20.

📄 Description (Arabic)

تحتوي نسخ BigBlueButton 3.0.19 وما دونها على ثغرة في معالجة حالة الميكروفون حيث يتم إرسال البيانات الصوتية إلى الخادم حتى عندما يكون الميكروفون مكتوماً عند الانضمام. على الرغم من أن الخادم يتجاهل هذه البيانات ولا يتم تشغيلها للمشاركين الآخرين، إلا أن مشغلي الخادم الضارين قد يتمكنون من الوصول إلى البيانات الصوتية. يقتصر التأثير على الفترة الزمنية بين انضمام المستخدم وأول مرة يقوم فيها بإلغاء كتم الصوت.

🤖 ملخص تنفيذي (AI)

إصدارات BigBlueButton 3.0.19 وما دونها تسرب بيانات صوتية إلى الخادم عند انضمام المستخدمين مع إيقاف الميكروفون، على الرغم من أن الصوت يتم تجاهله من جانب الخادم. تؤثر هذه الثغرة فقط على الفترة بين الانضمام وإلغاء الكتم الأول، وتم إصلاحها في الإصدار 3.0.20.

🤖 AI Intelligence Analysis Analyzed: May 30, 2026 08:55
🇸🇦 Saudi Arabia Impact Assessment
Saudi Relevance: medium
🏢 Affected Saudi Sectors
government education telecom
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
3.0
/ 10.0
🔧 Remediation Steps (English)
Upgrade BigBlueButton to version 3.0.20 or later immediately. For organizations unable to upgrade immediately, restrict server access to trusted administrators and monitor server logs for unauthorized audio data access attempts.
🔧 خطوات المعالجة (العربية)
قم بترقية BigBlueButton إلى الإصدار 3.0.20 أو أحدث على الفور. بالنسبة للمنظمات غير القادرة على الترقية فوراً، قيد وصول الخادم للمسؤولين الموثوقين ومراقبة سجلات الخادم لمحاولات الوصول غير المصرح به إلى بيانات الصوت.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.8.2.1 A.8.2.3
🔵 SAMA CSF
ID.RA-2 PR.DS-1
🟡 ISO 27001:2022
A.13.1.1 A.13.2.1
📦 Affected Products / CPE 1 entries
bigbluebutton:bigbluebutton
📊 CVSS Score
2.0
/ 10.0 — Low
📊 CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N
Attack VectorN — None / Network
Attack ComplexityH — High
Privileges RequiredH — High
User InteractionR — Required
ScopeU — Unchanged
ConfidentialityL — Low / Local
IntegrityN — None / Network
AvailabilityN — None / Network
📋 Quick Facts
Severity Low
CVSS Score2.0
CWECWE-200
EPSS0.03%
Exploit No
Patch ✓ Yes
Published 2026-02-21
Source Feed nvd
Views 5
🇸🇦 Saudi Risk Score
3.0
/ 10.0 — Saudi Risk
Priority: LOW
🏷️ Tags
patch-available CWE-200
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