CVE-2023-28110

What it is

Jumpserver 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 service and Web Terminal service. Prior to version 2.28.8, using illegal tokens to connect to a Kubernetes cluster through Koko can result in the execution of dangerous commands that may disrupt the Koko container environment and affect normal usage. The vulnerability has been fixed in v2.28.8.

At a glance

Exploitability

Can be exploited over the network with an admin-level account, but needs a user to act. High risk of data tampering, service disruption.

Exploit odds

0.8% chance of exploitation in the next 30 days (EPSS).

Fix

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

Timeline

1. 2023-03-16 17:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 05:46 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.8% in the next 30 days (EPSS).
• Severity: 5.7 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2023-03-16 17:15 UTC

Last modified

2026-06-17 05:46 UTC

Exploit probability

0.8% · EPSS, next 30 days

Weakness

CWE-77 · Command injection

Record status

Modified

Affected

• fit2cloud Jumpserver < 2.28.8
• fit2cloud Koko

Attack profile CVSS 3.1 · 5.7

Attack vector

Network

Complexity

High

Privileges needed

High

User interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

High

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-2023-28110.md and follow it. Check whether this project is affected by CVE-2023-28110. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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