[DRE-maint] Bug#986807: CVE-2021-28965

[Moritz Muehlenhoff]

Package: ruby2.7
Version: 2.7.2-3
Severity: important
Tags: security
X-Debbugs-Cc: Debian Security Team <team at security.debian.org>

https://www.ruby-lang.org/en/news/2021/04/05/xml-round-trip-vulnerability-in-rexml-cve-2021-28965/

Cheers,
        Moritz