CVE-2022-31065 - CVE House

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Status published Medium CVE-2022-31065

Cross site scripting vulnerability for private chat in bigbluebutton

6.5 CVSS

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

More from bigbluebutton

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BigBlueButton vulnerable to Chat DoS via invalid reactionEmojiId

BigBlueButton vulnerable to DoS via PollSubmitVote GraphQL mutation

BigBlueButton vulnerable to Stored XSS via name of user at Shared Notes

Some bbb-record-core files installed with wrong file permission

bbb-web API additional parameters considered

Affected Vendor

bigbluebutton

View all reports →

Affected Software

bigbluebutton

Vulnerable Versions:

< 2.4.8

Timeline

Official Publish: June 27th, 2022

Last Modified: April 23rd, 2025

Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1189 Drive-by Compromise

T1059.007 JavaScript

T1539 Steal Web Session Cookie

T1213 Data from Information Repositories

T1567 Exfiltration Over Web Service

T1491.001 Defacement