Vulnerability · Published Jan 13, 2021 · Assigned by jenkins
CVE-2021-21603
Medium 5.4
In plain English
A medium-severity security flaw in Jenkins from Jenkins project. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 64% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.4Medium
Exploit odds (30 days)1.0%top 35.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
Jenkins 2.274 and earlier, LTS 2.263.1 and earlier does not escape notification bar response contents, resulting in a cross-site scripting (XSS) vulnerability.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | jenkins | 2.275-r0 | ALPINE-CVE-2021-21603 |
| Alpine:v3.21 | jenkins | 2.275-r0 | ALPINE-CVE-2021-21603 |
| Alpine:v3.22 | jenkins | 2.275-r0 | ALPINE-CVE-2021-21603 |
| Alpine:v3.23 | jenkins | 2.275-r0 | ALPINE-CVE-2021-21603 |
| Alpine:v3.24 | jenkins | 2.275-r0 | ALPINE-CVE-2021-21603 |
| Maven | org.jenkins-ci.main:jenkins-core | 2.275 | GHSA-98gq-6hxg-52r6 |
| Maven | org.jenkins-ci.main:jenkins-core | 2.275 | GHSA-98gq-6hxg-52r6 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Jenkins project | Jenkins | unspecified – through 2.274unspecified – through LTS 2.263.1 |
References
- https://www.jenkins.io/security/advisory/2021-01-13/#SECURITY-1889 x_refsource_CONFIRM