What is CVE-2020-27601?

CVE-2020-27601 is a low-severity vulnerability in Bigbluebutton, classified under Exposure of Resource to Wrong Sphere. CVSS score: 3.5/10. Published 2022-09-29.

How severe is CVE-2020-27601?

Low severity. CVSS v3 base score is 3.5 out of 10.

Is CVE-2020-27601 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Bigbluebutton

CVE-2020-27601

In BigBlueButton before 2.2.7, lockSettingsProps.disablePrivateChat does not apply to already opened chats. This occurs in bigbluebutton-html5/imports/ui/components/chat/service.js.

Published 2022-09-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.008 (54.3th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Bigbluebutton

Weakness classification (CWE)

CWE-668 — Exposure of Resource to Wrong Sphere

Public proof-of-concept exploits

Live-Hack-CVE/CVE-2020-27601

References

github.com/bigbluebutton/bigbluebutton/compare/v2.2.6...v2.2.7 (Third Party Advisory, Release Notes)
github.com/bigbluebutton/bigbluebutton/commit/7dcdfb191373684bafa7b11cdd0128c98… (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2020-27601?: CVE-2020-27601 is a low-severity vulnerability in Bigbluebutton, classified under Exposure of Resource to Wrong Sphere. CVSS score: 3.5/10. Published 2022-09-29.
How severe is CVE-2020-27601?: Low severity. CVSS v3 base score is 3.5 out of 10.
Is CVE-2020-27601 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.