What is CVE-2021-21667?

CVE-2021-21667 is a medium-severity vulnerability in Jenkins Scriptler, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-06-16.

How severe is CVE-2021-21667?

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

Is CVE-2021-21667 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Jenkins Scriptler

CVE-2021-21667

Jenkins Scriptler Plugin 3.2 and earlier does not escape parameter names shown in job configuration forms, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Scriptler/Configure permission.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.757 (99.5th 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 Scriptler
Jenkins Project Scriptler Plugin — versions unspecified

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

ARPSyndicate/cve-scores

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-2021-21667?: CVE-2021-21667 is a medium-severity vulnerability in Jenkins Scriptler, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-06-16.
How severe is CVE-2021-21667?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2021-21667 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.