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CVE-2020-27602

30
FAUCET Score

CVE-2020-27602 is a critical separator injection vulnerability affecting BigBlueButton versions prior to 2.2.7. This flaw, rated 9.8 CVSS, allows unauthenticated attackers to achieve high confidentiality, integrity, and availability impacts over the network due to a lack of protection for separator injection in meetingId, userId, and authToken parameters. Despite its severity, there is currently no public exploit code available, nor is there evidence of active exploitation or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.2.7CPE matchmatch criteria
cpe:2.3:a:bigbluebutton:bigbluebutton:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.41%
Probability of exploitation in next 30 days
EPSS Percentile
69.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0141 is in the 57th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / bigbluebutton/bigbluebutton/commit/4bfd924c64da2681f4c037026021f47eb189d717
PatchThird Party Advisory
github.com / bigbluebutton/bigbluebutton/compare/v2.2.6...v2.2.7
Release NotesThird Party Advisory