CVE-2021-21700

Name: CVE-2021-21700
Creator: NVD / NIST
Published: 2021-11-12T11:15:08.113+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.68%

Last modified Jun 17, 2026

CVE-2021-21700 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. Jenkins Scriptler Plugin 3.3 and earlier does not escape the name of scripts on the UI when asking to confirm their deletion, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by exploitable by attackers able to create Scriptler scripts.. EPSS estimates a 0.68% chance of exploitation in the next 30 days.

Description

Jenkins Scriptler Plugin 3.3 and earlier does not escape the name of scripts on the UI when asking to confirm their deletion, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by exploitable by attackers able to create Scriptler scripts.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.68%

47.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Jenkins	Scriptler	<= 3.3

References

http://www.openwall.com/lists/oss-security/2021/11/12/1Mailing List, Third Party Advisory
https://www.jenkins.io/security/advisory/2021-11-12/#SECURITY-2406Vendor Advisory
http://www.openwall.com/lists/oss-security/2021/11/12/1Mailing List, Third Party Advisory
https://www.jenkins.io/security/advisory/2021-11-12/#SECURITY-2406Vendor Advisory

Timeline

Published: Nov 12, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21700?

How severe is CVE-2021-21700?

CVE-2021-21700 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.68% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21700?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-21700?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST