CVE-2020-28953 json
In BigBlueButton before 2.2.29, a user can vote more than once in a single poll.
published 5y ago modified 4mo ago also EUVD-2020-21339
- cvss
- 4.3
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 53%
- public exploits
- 0
- none known
Summary
In BigBlueButton before 2.2.29, a user can vote more than once in a single poll.
Patch / fix
Is CVE-2020-28953 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
0.70% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| NVD | 2.0 | 4.0 | AV:N/AC:L/Au:S/C:N/I:P/A:N |
References
-
github.com
/bigbluebutton/bigbluebutton/commit/d2cb02b3bd670265c6b1ba003f87fc261e0ac3e1
patch, third-party-advisory
-
github.com
/bigbluebutton/bigbluebutton/compare/v2.2.28...v2.2.29
release-notes, third-party-advisory
Sources
- CVE List CVE-2020-28953
- NVD CVE-2020-28953
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.