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CVE-2023-43650: JumpServer is an open source bastion host

51
This week
HIGH 8.2REMOTEUPGRADE

CVE-2023-43650 is a high-severity flaw (CVSS 8.2) affecting jumpserver. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

JumpServer is an open source bastion host. The verification code for resetting user's password is vulnerable to brute-force attacks due to the absence of rate limiting. JumpServer provides a feature allowing users to reset forgotten passwords. Affected users are sent a 6-digit verification code, ranging from 000000 to 999999, to facilitate the password reset. Although the code is only available in 1 minute, this window potentially allows for up t

Why this priority

  • High severity
  • Public exploit reference
  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score8.2 (High)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance0.6% (top 51%)
CISA exploited listNo
WeaknessCWE-640
Published2023-09-27
Last modified2026-06-17
Publisher (CNA): GitHub, Inc. · Vendor: fit2cloud

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Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

fit2cloud jumpserver UPGRADE
Affected: >= 2.0.0 and < 2.28.20 · >= 3.0.0 and < 3.7.1
Fixed in: 2.28.20, 3.7.1
Safe to downgrade to: a release before 2.0.0
1. Check installed version
apt-cache policy jumpserver || rpm -q jumpserver || jumpserver --version
2. UPGRADE to 2.28.20 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade jumpserver
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade jumpserver
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
3. If no update is available yet, DOWNGRADE to a release before 2.0.0 (Debian / Ubuntu)
apt-cache madison jumpserver sudo apt install jumpserver=<VERSION_BEFORE_2.0.0> sudo apt-mark hold jumpserver
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list jumpserver sudo dnf downgrade jumpserver-<VERSION_BEFORE_2.0.0> sudo dnf versionlock add jumpserver
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-43650?

jumpserver: upgrade to 2.28.20, 3.7.1. Exact commands for each OS are on this page.

Is CVE-2023-43650 being exploited?

CVE-2023-43650 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-43650 affect?

CVE-2023-43650 affects jumpserver. Severity is high (CVSS 8.2). JumpServer is an open source bastion host. The verification code for resetting user's password is vulnerable to brute-force attacks due to the absence of rate limiting. JumpServer provides a feature allowing users to reset forgotten passwor

How urgent is CVE-2023-43650?

Priority 51/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

References

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