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Vulnerability record · CVE-2023-42820 · published 27 September 2023

CVE-2023-42820: Fit2cloud jumpserver information exposure vulnerability

Fit2cloud · Jumpserver

JumpServer is an open source bastion host. This vulnerability is due to exposing the random number seed to the API, potentially allowing the randomly generated verification codes to be replayed, which could lead to password resets. If MFA is enabled users are not affect. Users not using local authentication are also not affected. Users are advised to upgrade to either version 2.28.19 or to 3.6.5. There are no known workarounds or this issue.

8.2 CVSS 3.1 High EPSS 5.4% · top 7.6% CWE-200 · Information exposure
8.2CVSS 3.1 base score
5.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

JumpServer is an open source bastion host. This vulnerability is due to exposing the random number seed to the API, potentially allowing the randomly generated verification codes to be replayed, which could lead to password resets. If MFA is enabled users are not affect. Users not using local authentication are also not affected. Users are advised to upgrade to either version 2.28.19 or to 3.6.5. There are no known workarounds or this issue.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/jumpserver/jumpserver/commit/42337f0d00b2a8d45ef063eb5b7deeef81597da5 Patch
https://github.com/jumpserver/jumpserver/security/advisories/GHSA-7prv-g565-82qp Vendor Advisory
https://github.com/jumpserver/jumpserver/commit/42337f0d00b2a8d45ef063eb5b7deeef81597da5 Patch
https://github.com/jumpserver/jumpserver/security/advisories/GHSA-7prv-g565-82qp Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.9CVE-2024-29202Fit2cloud jumpserver code injection vulnerabilityJumpServer is an open source bastion host and an operation and maintenance security audit system. Attackers can exploit a Jinja2 template injection v…EPSS 5.9%9.9CVE-2024-29201Fit2cloud jumpserver code injection vulnerabilityJumpServer is an open source bastion host and an operation and maintenance security audit system. Attackers can bypass the input validation mechanism…EPSS 5.9%9.9CVE-2023-43651Fit2cloud jumpserver code injection vulnerabilityJumpServer is an open source bastion host. An authenticated user can exploit a vulnerability in MongoDB sessions to execute arbitrary commands, leadi…EPSS 1.7%9.9CVE-2023-28110Fit2cloud jumpserver command injection vulnerabilityJumpserver is a popular open source bastion host, and Koko is a Jumpserver component that is the Go version of coco, refactoring coco's SSH/SFTP serv…EPSS 0.85%9.8CVE-2024-40629Fit2cloud jumpserver path traversal vulnerabilityJumpServer is an open-source Privileged Access Management (PAM) tool that provides DevOps and IT teams with on-demand and secure access to SSH, RDP, …EPSS 1.3%9.8CVE-2023-48193Fit2cloud jumpserver vulnerabilityInsecure Permissions vulnerability in JumpServer GPLv3 v.3.8.0 allows a remote attacker to execute arbitrary code via bypassing the command filtering…EPSS 2.0%9.8CVE-2023-42818Fit2cloud jumpserver improper authentication vulnerabilityJumpServer 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 cor…EPSS 0.58%9.1CVE-2024-40628Fit2cloud jumpserver path traversal vulnerabilityJumpServer is an open-source Privileged Access Management (PAM) tool that provides DevOps and IT teams with on-demand and secure access to SSH, RDP, …EPSS 0.86%

Source: NIST National Vulnerability Database (record CVE-2023-42820), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.