Bigbluebutton
CVE-2020-25820
MEDIUM
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
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:N/A:N
Lifecycle Timeline
1DescriptionNVD
BigBlueButton before 2.2.7 allows remote authenticated users to read local files and conduct SSRF attacks via an uploaded Office document that has a crafted URL in an ODF xlink field.
AnalysisAI
BigBlueButton before 2.2.7 allows remote authenticated users to read local files and conduct SSRF attacks via an uploaded Office document that has a crafted URL in an ODF xlink field. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.
Technical ContextAI
This vulnerability is classified as Server-Side Request Forgery (SSRF) (CWE-918), which allows attackers to make the server perform requests to unintended internal or external resources. BigBlueButton before 2.2.7 allows remote authenticated users to read local files and conduct SSRF attacks via an uploaded Office document that has a crafted URL in an ODF xlink field. Affected products include: Bigbluebutton. Version information: before 2.2.7.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Validate and allowlist destination URLs, block requests to internal networks, use network segmentation.
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
In BigBlueButton before 2.2.28 (or earlier), uploaded presentations are sent to clients without a Content-Type header, w
BigBlueButton is an open source web conferencing system. Rated medium severity (CVSS 5.4), this vulnerability is remotel
Same weakness CWE-918 – Server-Side Request Forgery (SSRF)
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External POC / Exploit Code
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