CVE-2023-30856

HIGHNVD 8.38.3—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.3 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 54% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
8.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.3Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 The project has been archived since 2021, and as of time of publication there are no plans to patch this issue and release a new version.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 available, including shutting down eDEX-UI when browsing the web and ensuring the eDEX terminal runs with lowest possible privileges.

CVSS v3
8.3
EG Score
8.3(medium)
EPSS
26.9%
KEV
Not listed

Published

April 28, 2023

Last Modified

November 21, 2024

References (6)

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 44× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-11 08:25 UTCEPSS rescore
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  18. 2026-06-27 22:34 UTCOSV refresh
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  1. 2026-06-22 14:24 UTCEPSS rescore
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  7. 2026-06-19 19:24 UTCEPSS rescore
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  9. 2026-06-18 17:51 UTCEPSS rescore
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  21. 2026-06-10 22:17 UTCEPSS rescore
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  24. 2026-06-10 09:17 UTCOSV refresh
  25. 2026-06-08 14:15 UTCEPSS rescore
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  46. 2026-05-29 13:43 UTCEPSS rescore
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  49. 2026-05-27 13:39 UTCEPSS rescore
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  55. 2026-05-26 07:17 UTCEPSS rescore
  56. 2026-05-25 02:11 UTCEG score recompute
  57. 2026-05-25 00:13 UTCOSV refresh

Frequently asked(5)

What is CVE-2023-30856?
CVE-2023-30856 is a high vulnerability published on April 28, 2023. 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…
When was CVE-2023-30856 disclosed?
CVE-2023-30856 was first published in the National Vulnerability Database on April 28, 2023, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-30856 actively exploited?
CVE-2023-30856 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 26.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-30856?
CVE-2023-30856 has a CVSS v3 base score of 8.3 (NVD).
How do I remediate CVE-2023-30856?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-30856, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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