Jenkins Mercurial Plugin 2.11 and earlier does not configure its XML parser to prevent XML external entity (XXE) attacks. References https://nvd.nist.gov/vuln/detail/CVE-2020-2305 https://www.jenkins.io/security/advisory/2020-11-04/#SECURITY-2115 https://github.com/advisories/GHSA-x58r-wxc3-7pqr