CVE-2020-28953
In BigBlueButton before 2.2.29, a user can vote more than once in a single poll.
In BigBlueButton before 2.2.29, a user can vote more than once in a single poll.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
In BigBlueButton before 2.2.29, a user can vote more than once in a single poll.
- Record
CVE-2020-28953- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - CVSS 2.0
- 4.0 Medium
AV:N/AC:L/Au:S/C:N/I:P/A:N - Updated
- 2026-11-02
CVE List No score
In BigBlueButton before 2.2.29, a user can vote more than once in a single poll.
- Record
CVE-2020-28953- Updated
- 2026-11-02
EUVDEUVD-2020-21339 No score
In BigBlueButton before 2.2.29, a user can vote more than once in a single poll.
- Record
EUVD-2020-21339- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-5j2f-fr5v-53mc No score
In BigBlueButton before 2.2.29, a user can vote more than once in a single poll.
In BigBlueButton before 2.2.29, a user can vote more than once in a single poll.
- Record
GHSA-5j2f-fr5v-53mc- Weakness
- CWE-732
- Updated
- 2026-11-02
OSV
In BigBlueButton before 2.2.29, a user can vote more than once in a single poll.
- Record
CVE-2020-28953- CVSS 3.1
- 4.3 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-28953 is a medium vulnerability (CVSS 4.3) in Bigbluebutton, published November 19, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.70%, the 53rd percentile. No source names a fixed version.