Jenkins Blue Ocean Plugin 1.23.2 and earlier provides an undocumented feature flag that, when enabled, allows an attacker with Job/Configure or Job/Create permission to read arbitrary files on the Jenkins controller file system.
http://www.openwall.com/lists/oss-security/2020/09/16/3
https://www.jenkins.io/security/advisory/2020-09-16/#SECURITY-1956
Source: MITRE
Published: 2020-09-16
Updated: 2020-09-18
Type: CWE-22
Base Score: 3.5
Vector: AV:N/AC:M/Au:S/C:P/I:N/A:N
Impact Score: 2.9
Exploitability Score: 6.8
Severity: LOW
Base Score: 6.5
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Impact Score: 3.6
Exploitability Score: 2.8
Severity: MEDIUM