CVE-2021-21664

Name: CVE-2021-21664
Creator: NVD / NIST
Published: 2021-06-10T15:15:08.907+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.99%

Last modified Jun 17, 2026

CVE-2021-21664 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. An incorrect permission check in Jenkins XebiaLabs XL Deploy Plugin 10.0.1 and earlier allows attackers with Generic Create permission to connect to an attacker-specified URL using attacker-specified credentials IDs obtained through another method, capturing Username/password credentials stored in Jenkins.. EPSS estimates a 0.99% chance of exploitation in the next 30 days.

Description

An incorrect permission check in Jenkins XebiaLabs XL Deploy Plugin 10.0.1 and earlier allows attackers with Generic Create permission to connect to an attacker-specified URL using attacker-specified credentials IDs obtained through another method, capturing Username/password credentials stored in Jenkins.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.99%

58.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-863

Affected Software

Vendor	Product	Versions
Jenkins	Xebialabs Xl Deploy	<= 10.0.1

References

http://www.openwall.com/lists/oss-security/2021/06/10/14Mailing List, Third Party Advisory
https://www.jenkins.io/security/advisory/2021-06-10/#SECURITY-1982Vendor Advisory
http://www.openwall.com/lists/oss-security/2021/06/10/14Mailing List, Third Party Advisory
https://www.jenkins.io/security/advisory/2021-06-10/#SECURITY-1982Vendor Advisory

Timeline

Published: Jun 10, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21664?

How severe is CVE-2021-21664?

CVE-2021-21664 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.99% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21664?

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-2021-21664?

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

Scan your code now

Source: NVD / NIST