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CVE-2022-36028

18
FAUCET Score

CVE-2022-36028 describes an open redirect vulnerability in Greenlight, the end-user interface for BigBlueButton servers, affecting versions prior to 2.13.0. This flaw allows an attacker to redirect users to arbitrary malicious websites due to improper validation of the "return_to" cookie on the login page. With a CVSS score of 6.1 (Medium), exploitation requires user interaction (UI:R) and could lead to information disclosure (C:L) and integrity issues (I:L), though it does not impact availability (A:N). There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0, < 2.13.0CPE match
cpe:2.3:a:bigbluebutton:greenlight:*:*:*:*:*:*:*:*
< 2.13.0CPE matchmatch criteria
cpe:2.3:a:bigbluebutton:greenlight:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.1CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.36%
Probability of exploitation in next 30 days
EPSS Percentile
28.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0036 is in the 29th percentile among its peer group of 26,219 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 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/greenlight/commit/20fe1ee71b5703fcc4ed698a959ad224fed19623
Patch
huntr.com / bounties/ba5834bd-1f04-4936-8e93-2442d45403bahttps:/
Broken LinkThird Party Advisory