CVE-2021-21683 json
Path traversal vulnerability on Windows in Jenkins
published 2021-10-06 5 y ago modified 2026-09-08 2 mo ago also BIT-jenkins-2021-21683 , EUVD-2022-2422 , GHSA-4pw5-r58h-fv24
- cvss
- 6.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.2%
- EPSS 2.2% chance of exploitation in 30 days, percentile 82%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- maven org.jenkins-ci.main:jenkins-core 2.303.2, 2.315
- bitnami jenkins 2.314.1
Exploit prediction
2.17% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 4.0 | AV:N/AC:L/Au:S/C:P/I:N/A:N |
| OSV | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.jenkins-ci.main:jenkins-core | <2.303.2 >=2.304, <2.315 |
2.303.2 2.315 |
| bitnami | jenkins | <2.314.1 |
2.314.1 |
Affected products
- Jenkins project Jenkins
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
- Technology feeds
References
-
github.com
/jenkinsci/jenkins/commit/3f679fc12d073676a4441d3fa8b5fff34c07662f
web
-
jenkins.io
/security/advisory/2021-10-06/#SECURITY-2481
web, vendor-advisory, advisory
-
openwall.com
/lists/oss-security/2021/10/06/1
mailing-list, web, third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-21683
advisory, web
-
github.com
/jenkinsci/jenkins
package
Sources
- CVE List CVE-2021-21683
- GitHub Advisory GHSA-4pw5-r58h-fv24
- NVD CVE-2021-21683
- OSV BIT-jenkins-2021-21683
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