Auth bypass in Fit2cloud Jumpserver
CVE-2025-62712
JumpServer is an open source bastion host and an operation and maintenance security audit system. In JumpServer versions prior to v3.10.20-lts and v4.10.11-lts, an authenticated, non-privileged user can retrieve connection tokens belonging to other users via the super-connection API endpoint (/api/v1/authentication/super-connection-token/). When accessed from a web browser, this endpoint returns connection tokens created by all users instead of restricting results to tokens owned by or authorized for the requester. An attacker who obtains these tokens can use them to initiate connections to managed assets on behalf of the original token owners, resulting in unauthorized access and privilege escalation across sensitive systems. This vulnerability is fixed in v3.10.20-lts and v4.10.11-lts.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.005 (41.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000
Affected products
- Fit2cloud Jumpserver
- Jumpserver — versions >= 4.0.0, < 4.10.11-lts, < 3.10.20-lts
Weakness classification (CWE)
References
- github.com/jumpserver/jumpserver/security/advisories/GHSA-6ghx-6vpv-3wg7 (Mitigation, Vendor Advisory)
- github.com/jumpserver/jumpserver/commit/453ad331eec9d9667a38de735d6612608e558491 (Patch)
Frequently asked questions
- What is CVE-2025-62712?
- CVE-2025-62712 is a critical-severity vulnerability in Fit2cloud Jumpserver, classified under Missing Authorization. CVSS score: 9.6/10. Published 2025-10-30.
- How severe is CVE-2025-62712?
- Critical severity. CVSS v3 base score is 9.6 out of 10.