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CVE-2021-21623

20
FAUCET Score

CVE-2021-21623 is an incorrect permission check vulnerability in Jenkins Matrix Authorization Strategy Plugin versions 2.6.5 and earlier. It allows authenticated attackers with Item/Read permission on nested items to bypass parent folder access restrictions. Rated Medium severity (CVSS 6.5), this vulnerability has a low attack complexity and could lead to high confidentiality impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.6.5CPE matchmatch criteria
cpe:2.3:a:jenkins:matrix_authorization_strategy:*:*:*:*:*:jenkins:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.01%
Probability of exploitation in next 30 days
EPSS Percentile
59.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0101 is in the 73rd percentile among its peer group of 21,974 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

mavenpatch availablevia ghsa
Product: org.jenkins-ci.plugins:matrix-authFixed in: 2.6.6
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 4.8Fixed in: jenkins-0:2.289.1.1624020353-1.el8
View patch
jenkinsvendor investigatingvia nvd_reference
View patch
redhatno patchvia redhat_api
Product: Red Hat OpenShift Container Platform 3.11Fixed in: jenkins-2-plugins
redhatno patchvia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: jenkins-2-plugins

Vendor Advisories (2)

mavenGHSA-96jw-3xw4-mq9pmedium

Incorrect permission checks in Jenkins Matrix Authorization Strategy Plugin may allow accessing some items

May 24, 2022
redhatCVE-2021-21623Moderate

jenkins-2-plugins/matrix-auth: Incorrect permission checks in Matrix Authorization Strategy Plugin

Mar 18, 2021

References

jenkins.io / security/advisory/2021-03-18
Vendor Advisory
openwall.com / lists/oss-security/2021/03/18/5
Mailing ListThird Party Advisory