Improper Restriction of Excessive Authentication Attempts in JumpServer - CVE-2023-43650
Published: September 27, 2023 / Updated: April 27, 2026
Vulnerability identifier: #VU128135
CSH Severity: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2023-43650
CWE-ID: CWE-307
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
JumpServer
JumpServer
Software vendor:
JumpServer
JumpServer
Description
The vulnerability allows a remote attacker to take over accounts.
The vulnerability exists due to improper restriction of excessive authentication attempts in the password reset verification code mechanism when validating password reset codes. A remote attacker can brute-force a 6-digit verification code to take over accounts.
The issue affects password reset flows for users who do not use multi-factor authentication, and the verification code is valid for 1 minute.
Remediation
Install security update from vendor's website.