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CVE-2023-30856

29
FAUCET Score

CVE-2023-30856 describes a critical cross-site websocket hijacking vulnerability in eDEX-UI versions 2.2.8 and prior, a science fiction terminal emulator. An attacker can exploit this flaw by tricking a user into visiting a malicious website, which then connects to eDEX-UI's internal websocket to send arbitrary shell commands. With a CVSS score of 10.0 (CRITICAL), this vulnerability allows for complete compromise of confidentiality, integrity, and availability, requiring no user interaction beyond visiting a malicious site. There is currently no evidence of active exploitation, public exploit code, or significant community discussion, and the archived project has no plans for a patch.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.2.8CPE matchmatch criteria
cpe:2.3:a:edex-ui_project:edex-ui:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.3HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
3.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.35%
Probability of exploitation in next 30 days
EPSS Percentile
27.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0035 is in the 5th percentile among its peer group of 36,835 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

Vendor Patches (1)

github_advisoryvendor investigatingvia nvd_reference
View patch

References

christian-schneider.net / CrossSiteWebSocketHijacking.html
Technical Description
github.com / GitSquared/edex-ui/blob/04a00c4079908788b371c6ecdefff96d0d9950f8/src/classes/terminal.class.js
Product
github.com / GitSquared/edex-ui/security/advisories/GHSA-q8xc-f2wf-ffh9
Vendor Advisory