Cross-site scripting in BigBlueButton - CVE-2022-31064
Published: June 22, 2022 / Updated: May 14, 2026
Vulnerability identifier: #VU131444
CSH Severity: Medium
CVSS v4: 6.9 [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]
CVE-ID: CVE-2022-31064
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
BigBlueButton
How to mitigate CVE-2022-31064
Install security update from vendor's website.
BigBlueButton - addressed in versions 2.4.8, 2.5.0