CVE-2023-43650

Non-MFA account takeover via brute-force attack on weak password reset code in jumpserver

Published Sep 27, 2023 CVSS 3.1 · 8.2 High EPSS < 1% KEV · Not listed
Description
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 to 1,000,000 validation attempts. This issue has been addressed in versions 2.28.20 and 3.7.1. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2023-48042 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 to 1,000,000 validation attempts. This issue has been addressed in versions 2.28.20 and 3.7.1. Users are advised to upgrade. There are no known workarounds for this vulnerability.
History
Type Values Removed Values Added
First Time appeared Jumpserver
Jumpserver jumpserver
CPEs cpe:2.3:a:jumpserver:jumpserver:*:*:*:*:*:*:*:*
Vendors & Products Jumpserver
Jumpserver jumpserver
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Mar 25, 2025, 7:24 PM
Reserved
Sep 20, 2023, 3:35 PM
Status
Analyzed
Published
Sep 27, 2023, 7:15 PM
Modified
Jun 17, 2026, 6:26 AM