CVE-2023-42442
MediumPublic exploitStarting in version 3.0.0 and prior to versions 3.5.5 and 3.6.4, session replays can download without authentication.
Published Sep 15, 2023 · Updated Aug 12, 2026 · Also known as GHSA-633x-3f4f-v9rw
Key Facts
Patch immediately- CVE-2023-42442 is a medium-severity vulnerability (CVSS 5.3 v3.1) affecting Jumpserver (Fit2cloud).
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 63% probability of exploitation in the next 30 days.
- Fixed versions are available, including Jumpserver 3.5.5.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS (30-day exploit likelihood)
63%
Higher than 99.1% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2023-42442 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
JumpServer is an open source bastion host and a professional operation and maintenance security audit system. Starting in version 3.0.0 and prior to versions 3.5.5 and 3.6.4, session replays can download without authentication. Session replays stored in S3, OSS, or other cloud storage are not affected. The api /api/v1/terminal/sessions/ permission control is broken and can be accessed anonymously. SessionViewSet permission classes set to [RBACPermission | IsSessionAssignee], relation is or, so any permission matched will be allowed. Versions 3.5.5 and 3.6.4 have a fix. After upgrading, visit the api $HOST/api/v1/terminal/sessions/?limit=1. The expected http response code is 401 (not_authenticated).
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| JumpserverFit2cloud | >= >= 3.0.0, < 3.5.5 | 3.5.5 |
Patched Releases
Jumpserver
3.5.5
Timeline
Publicly disclosed
Sep 15, 2023
Last updated
Aug 12, 2026
Weakness Type
- CWE-287 Improper Authentication
References
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2023/42xxx/CVE-2023-42442.json
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2023-42442
- patchhttps://github.com/jumpserver/jumpserver/commit/0a58bba59cd275bab8e0ae58bf4b359fbc5eb74a
- exploithttps://github.com/jumpserver/jumpserver/security/advisories/GHSA-633x-3f4f-v9rw
- otherhttps://github.com/jumpserver/jumpserver/blob/v3.6.1/apps/terminal/api/session/session.py#L91
FAQ
Common Questions.
JumpServer is an open source bastion host and a professional operation and maintenance security audit system.
Affected: Jumpserver (Fit2cloud) versions >= >= 3.0.0, < 3.5.5. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Jumpserver 3.5.5.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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