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    CVE-2022-31065

    BigBlueButton is an open source web conferencing system. In affected versions an attacker can embed malicious JS in their username and have it executed on the victim's client. When a user receives a private chat from the attacker (whose username contains malicious JavaScript), the script gets executed. Additionally when the victim receives a notification that the attacker has left the session. This issue has been patched in version 2.4.8 and 2.5.0. There are no known workarounds for this issue.

    Published:Jun 27, 2022
    Last Modified:Apr 23, 2025
    EPS:Jun 27, 2022
    EPSS Score:0.00311
    CVSS Score:6.5

    Affected Products

    Vendor
    Bigbluebutton
    Product
    Bigbluebutton

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-46682 (CVSS 8.5) — BigBlueButton is an open-source virtual classroom. Prior to 3.0.23, BigBlueButton allowed authenticated modera…
    CVE-2026-46353 (CVSS 8.1) — BigBlueButton is an open-source virtual classroom. Prior to 3.0.21, bbb-web checksum validation could be bypas…
    CVE-2026-46404 (CVSS 6.8) — BigBlueButton is an open-source virtual classroom. Prior to 3.0.23, the presentation URL validation did not pr…
    CVE-2026-46351 (CVSS 8.1) — BigBlueButton is an open-source virtual classroom. Prior to 3.0.21, bbb-web generated conference sessionToken …
    CVE-2026-27737 (CVSS 6.5) — BigBlueButton is an open-source virtual classroom. In versions prior to 3.0.19, the recording playback (presen…
    CVE-2026-41127 (CVSS 6.5) — BigBlueButton is an open-source virtual classroom. Versions prior to 3.0.24 have a missing authorization that …
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High