CVE-2021-21683

Name: CVE-2021-21683
Creator: NVD / NIST
Published: 2021-10-06T23:15:06.927+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 2.10%

Last modified Jun 17, 2026

CVE-2021-21683 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. The file browser in Jenkins 2.314 and earlier, LTS 2.303.1 and earlier may interpret some paths to files as absolute on Windows, resulting in a path traversal vulnerability allowing attackers with Overall/Read permission (Windows controller) or Job/Workspace permission (Windows agents) to obtain the contents of arbitrary files.. EPSS estimates a 2.10% chance of exploitation in the next 30 days.

Description

The file browser in Jenkins 2.314 and earlier, LTS 2.303.1 and earlier may interpret some paths to files as absolute on Windows, resulting in a path traversal vulnerability allowing attackers with Overall/Read permission (Windows controller) or Job/Workspace permission (Windows agents) to obtain the contents of arbitrary files.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

2.10%

79.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
Jenkins	Jenkins	<= 2.303.1
Jenkins	Jenkins	<= 2.314

References

http://www.openwall.com/lists/oss-security/2021/10/06/1Mailing List, Third Party Advisory
https://www.jenkins.io/security/advisory/2021-10-06/#SECURITY-2481Vendor Advisory
http://www.openwall.com/lists/oss-security/2021/10/06/1Mailing List, Third Party Advisory
https://www.jenkins.io/security/advisory/2021-10-06/#SECURITY-2481Vendor Advisory

Timeline

Published: Oct 6, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21683?

How severe is CVE-2021-21683?

CVE-2021-21683 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 2.10% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21683?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-21683?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST