Vulnerability · Published Jan 13, 2021 · Assigned by jenkins
CVE-2021-21610
Medium 6.1
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 1.2% (higher than 68% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.1Medium
Exploit odds (30 days)1.2%top 31.7% 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 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | jenkins | 2.275-r0 | ALPINE-CVE-2021-21610 |
| Alpine:v3.21 | jenkins | 2.275-r0 | ALPINE-CVE-2021-21610 |
| Alpine:v3.22 | jenkins | 2.275-r0 | ALPINE-CVE-2021-21610 |
| Alpine:v3.23 | jenkins | 2.275-r0 | ALPINE-CVE-2021-21610 |
| Alpine:v3.24 | jenkins | 2.275-r0 | ALPINE-CVE-2021-21610 |
| Maven | org.jenkins-ci.main:jenkins-core | 2.263.2 | GHSA-7qf3-c2q8-69m3 |
| Maven | org.jenkins-ci.main:jenkins-core | 2.275 | GHSA-7qf3-c2q8-69m3 |
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-2153 x_refsource_CONFIRM