SB2022060245 - Multiple vulnerabilities in BigBlueButton

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Main Vulnerability Database SB2022060245

SB2022060245 - Multiple vulnerabilities in BigBlueButton

Published: June 2, 2022 Updated: May 15, 2026

Security Bulletin ID SB2022060245
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 67% Low 33%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 vulnerabilities.


1) Cross-site scripting (CVE-ID: CVE-2022-31064)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to perform a stored cross-site scripting attack.

The vulnerability exists due to cross-site scripting in the username handling in private chat when sending private messages to users. A remote attacker can send a crafted private message to perform a stored cross-site scripting attack.

Only users in meetings with private chat enabled are affected.


2) Cross-site scripting (CVE-ID: CVE-2022-31065)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear


The vulnerability allows a remote user to execute arbitrary JavaScript in the victim's browser.

The vulnerability exists due to cross-site scripting in the private chat username handling when rendering private chat messages or leave notifications. A remote user can embed malicious JavaScript in a username to execute arbitrary JavaScript in the victim's browser.

User interaction is required for the victim to receive a private chat message or a notification that the sender left the session.


3) Resource exhaustion (CVE-ID: CVE-2022-29169)

CWE-ID: CWE-400 - Resource exhaustion

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to uncontrolled resource consumption in the html5client/useragent endpoint when parsing the User-Agent header. A remote attacker can send a specially crafted request to cause a denial of service.

The issue is triggered by excessive processing in the regular expression engine during device detection.


Remediation

Install update from vendor's website.

References