CVE-2020-28954
web/controllers/ApiController.groovy in BigBlueButton before 2.2.29 lacks certain parameter...
web/controllers/ApiController.groovy in BigBlueButton before 2.2.29 lacks certain parameter sanitization, as demonstrated by accepting control characters in a user name.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
web/controllers/ApiController.groovy in BigBlueButton before 2.2.29 lacks certain parameter sanitization, as demonstrated by accepting control characters in a user name.
- Record
CVE-2020-28954- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:N - Weakness
- CWE-116
- Updated
- 2026-11-02
CVE List No score
web/controllers/ApiController.groovy in BigBlueButton before 2.2.29 lacks certain parameter sanitization, as demonstrated by accepting control characters in a user name.
- Record
CVE-2020-28954- Updated
- 2026-11-02
EUVDEUVD-2020-21340 No score
web/controllers/ApiController.groovy in BigBlueButton before 2.2.29 lacks certain parameter sanitization, as demonstrated by accepting control characters in a user name.
- Record
EUVD-2020-21340- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-w2p3-47c3-r8h2 No score
web/controllers/ApiController.groovy in BigBlueButton before 2.2.29 lacks certain parameter...
web/controllers/ApiController.groovy in BigBlueButton before 2.2.29 lacks certain parameter sanitization, as demonstrated by accepting control characters in a user name.
- Record
GHSA-w2p3-47c3-r8h2- Weakness
- CWE-116
- Updated
- 2026-11-02
OSV
web/controllers/ApiController.groovy in BigBlueButton before 2.2.29 lacks certain parameter sanitization, as demonstrated by accepting control characters in a user name.
- Record
CVE-2020-28954- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/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-2020-28954 is a medium vulnerability (CVSS 5.3) in Bigbluebutton, published November 19, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.25%, the 69th percentile. No source names a fixed version.
References
github.com/bigbluebutton/bigbluebutton/compare/v2.2.28...v2.2.29
nvd.nist.gov/vuln/detail/CVE-2020-28954