How severe is CVE-2023-42442?

CVE-2023-42442 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability high.

Is CVE-2023-42442 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 56% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-42442?

CVE-2023-42442 affects Fit2cloud Jumpserver. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-42442?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-42442 published?

CVE-2023-42442 was published on 2023-09-15 and last updated on 2026-06-17.

CVE-2023-42442

CVE-2023-42442 is a high-severity vulnerability in Fit2cloud Jumpserver with a CVSS 3.x base score of 8.2. Its EPSS exploit-prediction score of 56% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-287.

Key facts

Severity: High (CVSS 3.x base score 8.2)
EPSS exploit prediction: 56% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Fit2cloud Jumpserver
Published: 2023-09-15
Last modified: 2026-06-17

Description

JumpServer is an open source bastion host and a professional operation and maintenance security audit system. Starting in version 3.0.0 and prior to versions 3.5.5 and 3.6.4, session replays can download without authentication. Session replays stored in S3, OSS, or other cloud storage are not affected. The api `/api/v1/terminal/sessions/` permission control is broken and can be accessed anonymously. SessionViewSet permission classes set to `[RBACPermission | IsSessionAssignee]`, relation is or, so any permission matched will be allowed. Versions 3.5.5 and 3.6.4 have a fix. After upgrading, visit the api `$HOST/api/v1/terminal/sessions/?limit=1`. The expected http response code is 401 (`not_authenticated`).

Frequently asked questions

What is CVE-2023-42442?: JumpServer is an open source bastion host and a professional operation and maintenance security audit system. Starting in version 3.0.0 and prior to versions 3.5.5 and 3.6.4, session replays can download without authentication. Session replays stored in S3, OSS, or other cloud storage are not affected. The api `/api/v1/terminal/sessions/` permission control is broken and can be accessed anonymously. SessionViewSet permission classes set to `[RBACPermission | IsSessionAssignee]`, relation is or, so any permission matched will be allowed. Versions 3.5.5 and 3.6.4 have a fix. After upgrading, visit the api `$HOST/api/v1/terminal/sessions/?limit=1`. The expected http response code is 401 (`not_authenticated`).
How severe is CVE-2023-42442?: CVE-2023-42442 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability high.
Is CVE-2023-42442 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 56% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-42442?: CVE-2023-42442 affects Fit2cloud Jumpserver. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-42442?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-42442 published?: CVE-2023-42442 was published on 2023-09-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:fit2cloud:jumpserver:*:*:*:*:*:*:*:*

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