Is CVE-2023-42818 in the CISA KEV catalog?

No. CVE-2023-42818 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-42818?

CVE-2023-42818 has a CVSS v3 base score of 5.4 (MEDIUM).

What is the EPSS score for CVE-2023-42818?

CVE-2023-42818 has an EPSS score of 0.58% (44th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-42818?

Upgrade jumpserver to 3.6.5 or later.

CVE & CISA-KEV Catalog

CVE-2023-42818

MEDIUM

5.4

CVSS v3

NVD

Description

JumpServer is an open source bastion host. When users enable MFA and use a public key for authentication, the Koko SSH server does not verify the corresponding SSH private key. An attacker could exploit a vulnerability by utilizing a disclosed public key to attempt brute-force authentication against the SSH service This issue has been patched in versions 3.6.5 and 3.5.6. Users are advised to upgrade. There are no known workarounds for this issue.

CWE-287Improper Authentication CWE-307

How to fix

Remediation Available

jumpserverNVD

Affected:>= 3.6.0, < 3.6.5Fixed in:3.6.5CVE-2023-42818derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityLow

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

Exploit Intelligence

0.58%probability of exploitation in 30 days

44thpercentile

Moderate risk: more likely to be exploited than 44% of all known CVEs.

References

Exploit1

github.com

Other references1

sonarsource.com

Related Vulnerabilities

Other CWE-287 (Improper Authentication) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-35082	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2023-35078	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2017-7921	Critical	9.8	100%	KEV	-
CVE-2024-7593	Critical	9.8	100%	KEV	-
CVE-2023-46805	High	8.2	100%	KEV + Ransom	-
CVE-2022-40684	Critical	9.8	100%	KEV + Ransom	Fix

Embed a live status badge for CVE-2023-42818

Markdown

[![CVE-2023-42818](https://tridentstack.com/cve/badge/CVE-2023-42818.svg)](https://tridentstack.com/cve/CVE-2023-42818)

HTML

<a href="https://tridentstack.com/cve/CVE-2023-42818"><img src="https://tridentstack.com/cve/badge/CVE-2023-42818.svg" alt="CVE-2023-42818"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-03-25.