CVE-2023-42820

What it is

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.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of data tampering.

Exploit odds

6.3% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2023-09-27 15:19 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 06:24 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 6.3% in the next 30 days (EPSS).
• Severity: 7.0 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2023-09-27 15:19 UTC

Last modified

2026-06-17 06:24 UTC

Exploit probability

6.3% · EPSS, next 30 days

Weakness

CWE-200 · Information exposure

Record status

Modified

Affected

• fit2cloud Jumpserver < 2.28.19
• fit2cloud Jumpserver < 3.6.5

Attack profile CVSS 3.1 · 7.0

Attack vector

Network

Complexity

High

Privileges needed

None

User interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

High

Availability

Low

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2023-42820.md and follow it. Check whether this project is affected by CVE-2023-42820. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

Copy as ticket · More options · Status badge