Bigbluebutton
CVE-2023-42803
HIGH
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
1DescriptionNVD
BigBlueButton is an open-source virtual classroom. BigBlueButton prior to version 2.6.0-beta.2 is vulnerable to unrestricted file upload, where the insertDocument API call does not validate the given file extension before saving the file, and does not remove it in case of validation failures. BigBlueButton 2.6.0-beta.2 contains a patch. There are no known workarounds.
AnalysisAI
BigBlueButton is an open-source virtual classroom. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
Technical ContextAI
This vulnerability is classified as Unrestricted File Upload (CWE-434), which allows attackers to upload malicious files that can be executed on the server. BigBlueButton is an open-source virtual classroom. BigBlueButton prior to version 2.6.0-beta.2 is vulnerable to unrestricted file upload, where the insertDocument API call does not validate the given file extension before saving the file, and does not remove it in case of validation failures. BigBlueButton 2.6.0-beta.2 contains a patch. There are no known workarounds. Affected products include: Bigbluebutton. Version information: version 2.6.0.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate file types server-side, store uploads outside webroot, use random filenames, scan for malware.
More in Bigbluebutton
View allBigBlueButton through 2.2.28 uses Ghostscript for processing of uploaded EPS documents, and consequently may be subject
BigBlueButton before 2.2.6 allows remote attackers to read arbitrary files because the presfilename (lowercase) value ca
The installation procedure in BigBlueButton before 2.2.28 (or earlier) uses ClueCon as the FreeSWITCH password, which al
An issue was discovered in BigBlueButton through 2.2.29. Rated high severity (CVSS 7.5), this vulnerability is remotely
The installation procedure in BigBlueButton before 2.2.28 (or earlier) exposes certain network services to external inte
BigBlueButton before 2.2.27 has an unsafe JODConverter setting in which LibreOffice document conversions can access exte
BigBlueButton before 2.2.5 allows remote attackers to obtain sensitive files via Local File Inclusion. Rated high severi
BigBlueButton versions 3.0.21 and below allow remote denial of service when ClamAV is configured following official docu
In BigBlueButton before 2.2.28 (or earlier), the client-side Mute button only signifies that the server should stop acce
BigBlueButton before 2.3 does not implement LibreOffice sandboxing. Rated medium severity (CVSS 6.5), this vulnerability
BigBlueButton before 2.2.7 allows remote authenticated users to read local files and conduct SSRF attacks via an uploade
In BigBlueButton before 2.2.28 (or earlier), uploaded presentations are sent to clients without a Content-Type header, w
Same technique File Upload
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External POC / Exploit Code
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