8.2

CVE-2023-42820: Random seed leakage in Jumpserver

Modified
Published 26-09-2023Last modified 23-09-2024

Vulnerability summary

CVE-2023-42820 is a high (CVSS 8.2) vulnerability in fit2cloud jumpserver. EPSS estimates a 6.30% chance of exploitation in the next 30 days, higher than 93.6% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 6% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
8.2/10
010
High · v3.1 (NVD)
EPSS score
6.30%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 26-09-2023
    PublishedVulnerability first disclosed.
  2. 23-09-2024
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

6.30%

Chance of exploitation in the next 30 days

Percentile

94%

Versus all other CVEs

30-day change

No change 0.00 pp

From 6.30% 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

0 found

No public exploits indexed.

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≥ 2.24.0, < 2.28.19 | ≥ 3.0.0, < 3.6.5
Jumpserver1 product
  • jumpserver≥ 2.24, < 2.28.19 | ≥ 3.0.0, < 3.6.5

2 vendors · 2 products

References

2 links