CVE-2023-43650 HIGH

CVE-2023-43650: Non-MFA account takeover via brute-force attack on weak password reset code in jumpserver

Vendor Jumpserver
Product jumpserver
Weakness CWE-640 · Weak password recovery
Published September 27, 2023
Last update March 25, 2025

CVSS base score

8.2/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

September 27, 2023 CVE published
March 25, 2025 Record updated