CVE-2021-21610

CWE-79 — Cross-site Scripting (XSS)6 documents6 sources
Severity
6.1MEDIUM
EPSS
0.3%
top 44.34%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Jenkins Project JenkinsJenkins Jenkins
Timeline
PublishedJan 13
Latest updateMay 24

Description

Jenkins 2.274 and earlier, LTS 2.263.1 and earlier does not implement any restrictions for the URL rendering a formatted preview of markup passed as a query parameter, resulting in a reflected cross-site scripting (XSS) vulnerability if the configured markup formatter does not prohibit unsafe elements (JavaScript) in markup.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NExploitability: 2.8 | Impact: 2.7

Affected Packages3 packages

▶Mavenorg.jenkins-ci.main:jenkins-core2.264 — 2.275+1
▶NVDjenkins/jenkins2.263.1+1
▶CVEListV5jenkins_project/jenkinsunspecified — 2.274+1

🔴Vulnerability Details

3
GHSA
Reflected XSS vulnerability in Jenkins markup formatter preview↗2022-05-24
▶
OSV
Reflected XSS vulnerability in Jenkins markup formatter preview↗2022-05-24
▶
CVEList
CVE-2021-21610: Jenkins 2↗2021-01-13
▶

📋Vendor Advisories

2
Red Hat
jenkins: Reflected XSS vulnerability in markup formatter preview↗2021-01-13
▶
Jenkins
Jenkins Security Advisory 2021-01-13↗2021-01-13
▶
CVE-2021-21610 (MEDIUM CVSS 6.1) | Jenkins 2.274 and earlier | cvebase.io