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CVE-2021-3169

31
FAUCET Score

CVE-2021-3169 is a critical vulnerability affecting Jumpserver versions prior to 2.6.2, 2.5.4, and 2.4.5. It allows unauthenticated attackers to create connection tokens via an API lacking access control, subsequently gaining unauthorized access to sensitive assets. With a CVSS score of 9.8 (CRITICAL), this vulnerability presents a severe risk due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, and no public exploit code or significant community discussion has been identified.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.4.0, < 2.4.5CPE matchmatch criteria
cpe:2.3:a:jumpserver:jumpserver:*:*:*:*:*:*:*:*
>= 2.5.0, < 2.5.4CPE matchmatch criteria
cpe:2.3:a:jumpserver:jumpserver:*:*:*:*:*:*:*:*
>= 2.6.0, < 2.6.2CPE matchmatch criteria
cpe:2.3:a:jumpserver:jumpserver:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.75%
Probability of exploitation in next 30 days
EPSS Percentile
84.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0275 is in the 75th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

blog.fit2cloud.com
Third Party Advisory
mp.weixin.qq.com / s/5tgcaIrnDnGP-LvWPw9YCg
Third Party Advisory
s.tencent.com / research/bsafe/1228.html
Third Party Advisory