CVE-2021-21623

Name: CVE-2021-21623
Creator: NVD / NIST
Published: 2021-03-18T14:15:13.227+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.01%

Last modified Jun 17, 2026

CVE-2021-21623 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. An incorrect permission check in Jenkins Matrix Authorization Strategy Plugin 2.6.5 and earlier allows attackers with Item/Read permission on nested items to access them, even if they lack Item/Read permission for parent folders.. EPSS estimates a 1.01% chance of exploitation in the next 30 days.

Description

An incorrect permission check in Jenkins Matrix Authorization Strategy Plugin 2.6.5 and earlier allows attackers with Item/Read permission on nested items to access them, even if they lack Item/Read permission for parent folders.

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

1.01%

58.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-863

Affected Software

Vendor	Product	Versions
Jenkins	Matrix Authorization Strategy	<= 2.6.5

References

http://www.openwall.com/lists/oss-security/2021/03/18/5Mailing List, Third Party Advisory
https://www.jenkins.io/security/advisory/2021-03-18/#SECURITY-2180Vendor Advisory
http://www.openwall.com/lists/oss-security/2021/03/18/5Mailing List, Third Party Advisory
https://www.jenkins.io/security/advisory/2021-03-18/#SECURITY-2180Vendor Advisory

Timeline

Published: Mar 18, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21623?

How severe is CVE-2021-21623?

CVE-2021-21623 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.01% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21623?

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-2021-21623?

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

Scan your code now

Source: NVD / NIST