CVE-2020-28954

Name: CVE-2020-28954
Creator: NVD / NIST
Published: 2020-11-19T22:15:13.757+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.23%

Last modified Jun 17, 2026

CVE-2020-28954 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. web/controllers/ApiController.groovy in BigBlueButton before 2.2.29 lacks certain parameter sanitization, as demonstrated by accepting control characters in a user name.. EPSS estimates a 1.23% chance of exploitation in the next 30 days.

Description

web/controllers/ApiController.groovy in BigBlueButton before 2.2.29 lacks certain parameter sanitization, as demonstrated by accepting control characters in a user name.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

1.23%

65.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-116

Affected Software

Vendor	Product	Versions
Bigbluebutton	Bigbluebutton	< 2.2.29

References

https://github.com/bigbluebutton/bigbluebutton/commit/5c911ddeec4493f40f42e2f137800ed4692004a4Patch, Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/commit/e59bcd0c33a6a3203c011faa8823ba2cac1e4f37Patch, Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/compare/v2.2.28...v2.2.29Release Notes, Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/issues/10818Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/commit/5c911ddeec4493f40f42e2f137800ed4692004a4Patch, Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/commit/e59bcd0c33a6a3203c011faa8823ba2cac1e4f37Patch, Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/compare/v2.2.28...v2.2.29Release Notes, Third Party Advisory
https://github.com/bigbluebutton/bigbluebutton/issues/10818Third Party Advisory

Timeline

Published: Nov 19, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-28954?

web/controllers/ApiController.groovy in BigBlueButton before 2.2.29 lacks certain parameter sanitization, as demonstrated by accepting control characters in a user name.

How severe is CVE-2020-28954?

CVE-2020-28954 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.23% probability of exploitation in the next 30 days.

How do I fix CVE-2020-28954?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-28954?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST