[org.jenkins-ci.plugins:fitnesse] XXE vulnerability in FitNesse Plugin

FitNesse Plugin 1.30 and earlier does not configure the XML parser to prevent XML external entity (XXE) attacks.

This allows a user able to control the input files for its post-build step to have Jenkins parse a crafted file that uses external entities for extraction of secrets from the Jenkins controller, server-side request forgery, or denial-of-service attacks.

FitNesse Plugin 1.31 disables external entity processing for its XML parser.

References

• https://nvd.nist.gov/vuln/detail/CVE-2020-2120
• https://jenkins.io/security/advisory/2020-02-12/#SECURITY-1751
• http://www.openwall.com/lists/oss-security/2020/02/12/3
• https://github.com/advisories/GHSA-c3cg-mv5w-cvw8