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Improper Validation Affecting org.jenkins-ci.main:jenkins-core package, versions [2.278,2.287) [,2.277.2)

0.0
medium

Snyk CVSS

    Attack Complexity Low

    Threat Intelligence

    EPSS 0.05% (21st percentile)
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NVD
4.3 medium
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Red Hat
4.3 medium

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  • Snyk ID SNYK-JAVA-ORGJENKINSCIMAIN-1244082
  • published 8 Apr 2021
  • disclosed 8 Apr 2021
  • credit Unknown
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Introduced: 8 Apr 2021

CVE-2021-21640 Open this link in a new tab
CWE-289 Open this link in a new tab

How to fix?

Upgrade org.jenkins-ci.main:jenkins-core to version 2.287, 2.277.2 or higher.

Overview

org.jenkins-ci.main:jenkins-core is an open source automation server.

Affected versions of this package are vulnerable to Improper Validation. It does not properly check that a newly created view has an allowed name. When a form to create a view is submitted, the name is included twice in the submission. One instance is validated, but the other instance is used to create the value. This allows attackers with View/Create permission to create views with invalid or already-used names.