Vulnerability Details : CVE-2021-21691

Creating symbolic links is possible without the 'symlink' agent-to-controller access control permission in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier.
Published 2021-11-04 17:15:09
Updated 2023-11-22 21:23:05
Source Jenkins Project
View at NVD,   CVE.org

Threat overview for CVE-2021-21691

Top countries where our scanners detected CVE-2021-21691
Top open port discovered on systems with this issue 80
IPs affected by CVE-2021-21691 29,600
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2021-21691!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2021-21691

EPSS FAQ
0.26%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 66 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-21691

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
7.5
 HIGH AV:N/AC:L/Au:N/C:P/I:P/A:P
10.0
6.4
 NIST
9.8
 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.9
5.9
 NIST

CWE ids for CVE-2021-21691

  • The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
    Assigned by: nvd@nist.gov (Primary)
  • The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
    Assigned by: jenkinsci-cert@googlegroups.com (Primary)

References for CVE-2021-21691

Products affected by CVE-2021-21691

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