High severity · published Nov 26, 2020
CVE-2020-29043
An issue was discovered in BigBlueButton through 2.2.29
7.5
CVSS
1.5%
EPSS
No
On KEV
Description
An issue was discovered in BigBlueButton through 2.2.29. When at attacker is able to view an account_activations/edit?token= URI, the attacker can create an approved user account associated with an email address that has an arbitrary domain name.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.5% · higher than 73% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BI
Bigbluebutton · Bigbluebutton
through 2.2.29 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-29043
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-29043
Third Party Advisory
http://packetstormsecurity.com/files/160239/BigBlueButton-2.2.29-E-mail-Validation-Bypass.html
Exploit
https://cxsecurity.com/issue/WLB-2020110211
Release Notes
https://github.com/bigbluebutton/bigbluebutton/releases
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