Information disclosure in Fit2cloud Jumpserver

CVE-2023-42820

JumpServer is an open source bastion host. This vulnerability is due to exposing the random number seed to the API, potentially allowing the randomly generated verification codes to be replayed, which could lead to password resets. If MFA is enabled users are not affect. Users not using local authentication are also not affected. Users are advised to upgrade to either version 2.28.19 or to 3.6.5. There are no known workarounds or this issue.

Vulnerability class: Information Disclosure

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L.

EPSS exploit prediction

EPSS: 0.063 (93.5th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 93.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2023-42820: rose from 0.054 to 0.063.

EPSS over last 30 days · oldest: 0.054 · newest: 0.063 · change: +0.009

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2023-42820?
CVE-2023-42820 is a high-severity vulnerability in Fit2cloud Jumpserver, classified under Information Disclosure. CVSS score: 7.0/10. Published 2023-09-27.
How severe is CVE-2023-42820?
High severity. CVSS v3 base score is 7.0 out of 10.
Is CVE-2023-42820 known to be exploited?
25 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.