What’s Vulnerable › Vulnerabilities

CVE-2023-42442: JumpServer session replays download without authentication

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 63.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-09-15 · updated 2026-06-17
• Weakness: CWE-287

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

• jumpserver: from 3.0.0 before 3.5.5; from 3.6.0 before 3.6.4 — fixed in 3.5.5, 3.6.4

How to fix

Upgrade to a fixed version: jumpserver 3.5.5, 3.6.4. Check the vendor advisory for mitigations.

References

• https://github.com/jumpserver/jumpserver/blob/v3.6.1/apps/terminal/api/session/session.py#L91
• https://github.com/jumpserver/jumpserver/commit/0a58bba59cd275bab8e0ae58bf4b359fbc5eb74a
• https://github.com/jumpserver/jumpserver/security/advisories/GHSA-633x-3f4f-v9rw
• https://github.com/jumpserver/jumpserver/blob/v3.6.1/apps/terminal/api/session/session.py#L91
• https://github.com/jumpserver/jumpserver/commit/0a58bba59cd275bab8e0ae58bf4b359fbc5eb74a
• https://github.com/jumpserver/jumpserver/security/advisories/GHSA-633x-3f4f-v9rw

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