What’s Vulnerable › Vulnerabilities

CVE-2021-3169

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-07-23 · updated 2026-06-17
• Weakness: CWE-74

Description

An issue in Jumpserver before 2.6.2, before 2.5.4, before 2.4.5 allows attackers to create a connection token through an API which does not have access control and use it to access sensitive assets.

Affected products

• Jumpserver: from 2.4.0 before 2.4.5; from 2.5.0 before 2.5.4; from 2.6.0 before 2.6.2 — fixed in 2.4.5, 2.5.4, 2.6.2

How to fix

Upgrade to a fixed version: Jumpserver 2.4.5, 2.5.4, 2.6.2. Check the vendor advisory for mitigations.

References

• https://blog.fit2cloud.com/?p=1764
• https://mp.weixin.qq.com/s/5tgcaIrnDnGP-LvWPw9YCg
• https://s.tencent.com/research/bsafe/1228.html
• https://blog.fit2cloud.com/?p=1764
• https://mp.weixin.qq.com/s/5tgcaIrnDnGP-LvWPw9YCg
• https://s.tencent.com/research/bsafe/1228.html

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