CVE-2021-21648

Name: CVE-2021-21648
Creator: NVD / NIST
Published: 2021-05-11T15:15:07.873+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 11.31%

Last modified Jun 17, 2026

CVE-2021-21648 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. Jenkins Credentials Plugin 2.3.18 and earlier does not escape user-controlled information on a view it provides, resulting in a reflected cross-site scripting (XSS) vulnerability.. EPSS estimates a 11.31% chance of exploitation in the next 30 days.

Description

Jenkins Credentials Plugin 2.3.18 and earlier does not escape user-controlled information on a view it provides, resulting in a reflected cross-site scripting (XSS) vulnerability.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

11.31%

95.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Jenkins	Credentials	<= 2.3.18

References

https://www.jenkins.io/security/advisory/2021-05-11/#SECURITY-2349Vendor Advisory
https://www.jenkins.io/security/advisory/2021-05-11/#SECURITY-2349Vendor Advisory

Timeline

Published: May 11, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21648?

Jenkins Credentials Plugin 2.3.18 and earlier does not escape user-controlled information on a view it provides, resulting in a reflected cross-site scripting (XSS) vulnerability.

How severe is CVE-2021-21648?

CVE-2021-21648 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 11.31% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21648?

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-2021-21648?

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

Scan your code now

Source: NVD / NIST