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Vulnerability record · CVE-2020-29043 · published 26 November 2020

CVE-2020-29043: Bigbluebutton information exposure vulnerability

Bigbluebutton · Bigbluebutton

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.

7.5 CVSS 3.1 High EPSS 1.5% · top 27.4% CWE-200 · Information exposure
7.5CVSS 3.1 base score, v2 5.0
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://packetstormsecurity.com/files/160239/BigBlueButton-2.2.29-E-mail-Validation-Bypass.html Third Party Advisory
https://cxsecurity.com/issue/WLB-2020110211 ExploitThird Party Advisory
https://github.com/bigbluebutton/bigbluebutton/releases Release NotesThird Party Advisory
http://packetstormsecurity.com/files/160239/BigBlueButton-2.2.29-E-mail-Validation-Bypass.html Third Party Advisory
https://cxsecurity.com/issue/WLB-2020110211 ExploitThird Party Advisory
https://github.com/bigbluebutton/bigbluebutton/releases Release NotesThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2020-27602Bigbluebutton injection vulnerabilityBigBlueButton before 2.2.7 does not have a protection mechanism for separator injection in meetingId, userId, and authToken.EPSS 1.4%9.8CVE-2020-27605Bigbluebutton vulnerabilityBigBlueButton through 2.2.28 uses Ghostscript for processing of uploaded EPS documents, and consequently may be subject to attacks related to a "schw…EPSS 1.2%9.8CVE-2020-12443Bigbluebutton path traversal vulnerabilityBigBlueButton before 2.2.6 allows remote attackers to read arbitrary files because the presfilename (lowercase) value can be a .pdf filename while th…EPSS 3.7%8.8CVE-2023-42803Bigbluebutton unrestricted file upload vulnerabilityBigBlueButton is an open-source virtual classroom. BigBlueButton prior to version 2.6.0-beta.2 is vulnerable to unrestricted file upload, where the i…EPSS 0.54%8.4CVE-2020-27613Bigbluebutton cleartext storage of sensitive data vulnerabilityThe installation procedure in BigBlueButton before 2.2.28 (or earlier) uses ClueCon as the FreeSWITCH password, which allows local users to achieve u…EPSS 0.27%8.2CVE-2026-27466Bigbluebutton exposure of resource to wrong sphere vulnerabilityBigBlueButton is an open-source virtual classroom. In versions 3.0.21 and below, the official documentation for "Server Customization" on Support for…EPSS 0.58%7.5CVE-2025-61602Bigbluebutton vulnerabilityBigBlueButton is an open-source virtual classroom. A denial-of-service (DoS) vulnerability in versions prior to 3.0.13 allows any authenticated user …EPSS 0.39%7.5CVE-2025-61601Bigbluebutton vulnerabilityBigBlueButton is an open-source virtual classroom. A Denial of Service (DoS) vulnerability in versions prior to 3.0.13 allows any authenticated user …EPSS 0.47%

Source: NIST National Vulnerability Database (record CVE-2020-29043), CISA KEV, FIRST EPSS (scores of 2026-10-08). This page is refreshed as NVD updates the record.