Medium severity · published Jun 24, 2022
CVE-2022-27238
BigBlueButton version 2.4.7 (or earlier) is vulnerable to stored Cross-Site Scripting (XSS) in the private chat functionality
5.4
CVSS
0.5%
EPSS
No
On KEV
Description
BigBlueButton version 2.4.7 (or earlier) is vulnerable to stored Cross-Site Scripting (XSS) in the private chat functionality. A threat actor could inject JavaScript payload in his/her username. The payload gets executed in the browser of the victim each time the attacker sends a private message to the victim or when notification about the attacker leaving room is displayed.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BI
Bigbluebutton · Bigbluebutton
through 2.4.7 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-27238
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-27238
Third Party Advisory
https://www.mgm-sp.com/en/cve-2022-27238-bigbluebutton-xss/
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