GHSA-cphv-7cxw-5hcc

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GHSA-cphv-7cxw-5hcc

Summary: XXE vulnerability in Jenkins Filesystem Trigger Plugin

Details: Jenkins Filesystem Trigger Plugin 0.40 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks. This allows attackers with Job/Configure permission or otherwise able to control the contents of an XML file being polled for changes to have Jenkins parse a crafted XML document that uses external entities for extraction of secrets from the polling Jenkins controller or agent, server-side request forgery, or denial-of-service attacks. Jenkins Filesystem Trigger Plugin 0.41 disables external entity resolution for its XML parser.

References: https://nvd.nist.gov/vuln/detail/CVE-2021-21657, https://github.com/jenkinsci/fstrigger-plugin, https://www.jenkins.io/security/advisory/2021-05-25/#SECURITY-2339, http://www.openwall.com/lists/oss-security/2021/05/25/3