What is CVE-2021-21619?

CVE-2021-21619 is a medium-severity vulnerability in Jenkins Claim, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-02-24.

How severe is CVE-2021-21619?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Jenkins Claim

CVE-2021-21619

Jenkins Claim Plugin 2.18.1 and earlier does not escape the user display name, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers who are able to control the display names of Jenkins users, either via the security realm, or directly inside Jenkins.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.094 (94.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Jenkins Claim
Jenkins Project Claim Plugin — versions unspecified

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

jenkinsci-cert@googlegroups.com (x_refsource_CONFIRM, Vendor Advisory)
jenkinsci-cert@googlegroups.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2021-21619?: CVE-2021-21619 is a medium-severity vulnerability in Jenkins Claim, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-02-24.
How severe is CVE-2021-21619?: Medium severity. CVSS v3 base score is 5.4 out of 10.