CVE-2023-30856: eDEX-UI is a science fiction terminal emulator

Q: How do I fix CVE-2023-30856?

edex-ui: upgrade to newer than 2.2.8. Exact commands for each OS are on this page.

Q: Is CVE-2023-30856 being exploited?

CVE-2023-30856 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-30856 affect?

CVE-2023-30856 affects edex-ui. Severity is high (CVSS 8.3). eDEX-UI is a science fiction terminal emulator. Versions 2.2.8 and prior are vulnerable to cross-site websocket hijacking. When running eDEX-UI and browsing the web, a malicious website can connect to eDEX's internal terminal control websoc

Q: How urgent is CVE-2023-30856?

Priority 41/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 8.3REMOTEUPGRADE

CVE-2023-30856 is a high-severity flaw (CVSS 8.3) affecting edex-ui. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

eDEX-UI is a science fiction terminal emulator. Versions 2.2.8 and prior are vulnerable to cross-site websocket hijacking. When running eDEX-UI and browsing the web, a malicious website can connect to eDEX's internal terminal control websocket, and send arbitrary commands to the shell. The project has been archived since 2021, and as of time of publication there are no plans to patch this issue and release a new version. Some workarounds are avai

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 72%)
CISA exploited list	No
Weakness	CWE-346, CWE-1385
Published	2023-04-28
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: edex-ui project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-04-28 16:15 UTCPublished CVE record published
2026-06-17 05:55 UTCUpdated Record last modified

edex-ui project edex-ui UPGRADE

Affected: <= 2.2.8

Fixed in: newer than 2.2.8

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy edex-ui || rpm -q edex-ui || edex-ui --version

2. UPGRADE to newer than 2.2.8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade edex-ui

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade edex-ui

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-30856?

edex-ui: upgrade to newer than 2.2.8. Exact commands for each OS are on this page.

Is CVE-2023-30856 being exploited?

CVE-2023-30856 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-30856 affect?

CVE-2023-30856 affects edex-ui. Severity is high (CVSS 8.3). eDEX-UI is a science fiction terminal emulator. Versions 2.2.8 and prior are vulnerable to cross-site websocket hijacking. When running eDEX-UI and browsing the web, a malicious website can connect to eDEX's internal terminal control websoc

How urgent is CVE-2023-30856?

Priority 41/100. High severity; Remotely exploitable, no login, no user action

References

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