CVE-2023-43652Public exploitNetwork attack vector

Account takeover via caller-unverified public-key token issuance

Published Sep 27, 2023 · Updated Mar 25, 2025

Authentication bypass in JumpServer 2.0.0 through 2.28.19 and 3.0.0 through 3.7.0 allows remote attackers to impersonate users. The Core token API accepts a username and matching SSH public key, trusts the caller as KoKo, and issues a personal token without private-key proof. A target account's username and registered public key are required; the token exposes that user's information and authorized actions.

CVSS severity8.2
High
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in JumpServer 2.0.0 through 2.28.19 and 3.0.0 through 3.7.0 allows remote attackers to impersonate users. The Core token API accepts a username and matching SSH public key, trusts the caller as KoKo, and issues a personal token without private-key proof. A target account's username and registered public key are required; the token exposes that user's information and authorized actions.

The record

CVE
CVE-2023-43652
Published
Sep 27, 2023
Updated
Mar 25, 2025
Vendor
JumpServer
Product
JumpServer
Classifications
CWE-862, T1078
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 27, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 2.0.0, < 2.28.20
  2. Affected versionversion=2.0.0 <2.28.20
  3. Affected versionversion=>= 3.0.0, < 3.7.1
  4. Affected versionversion=3.0.0 <3.7.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

JumpServer · JumpServerversion=>= 2.0.0, < 2.28.20; version=2.0.0 <2.28.20; version=>= 3.0.0, < 3.7.1; version=3.0.0 <3.7.1

Published CVSS scores

6.5GitHub Security AdvisoryCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
8.2GitHub CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
T1078Valid Accounts

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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