8.2

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

Analyzed
Published 27-09-2023Last modified 25-03-2025

Vulnerability summary

CVE-2023-43650 is a high (CVSS 8.2) vulnerability in fit2cloud jumpserver. EPSS estimates a 0.60% chance of exploitation in the next 30 days, higher than 48.8% of scored vulnerabilities. 2 public exploits are recorded.

Priority
Prioritisepublic exploit

Public exploit (GitHub, Date unknown)

Source freshness unavailable

How is this decided?
CVSS score
8.2/10
010
High · v3.1 (CVE.org)
EPSS score
0.60%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits2github, reference

Timeline

  1. 27-09-2023
    PublishedVulnerability first disclosed.
  2. 25-03-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.60%

Chance of exploitation in the next 30 days

Percentile

49%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.60% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

2 found
  • githubUnverified

    Jumpserver

    Maturity: poc

  • referenceUnverified

    Exploit Reference (sonarsource.com)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Fit2cloud1 product
  • jumpserver≥ 2.0.0, < 2.28.20 | ≥ 3.0.0, < 3.7.1
Jumpserver1 product
  • jumpserver≥ 2.0.0, < 2.28.20 | ≥ 3.0.0, < 3.7.1

2 vendors · 2 products

References

2 links