github_osv/GHSA-8cr8-4vfw-mr7h
REXML round-trip instability
The REXML gem before 3.2.5 in Ruby before 2.6.7, 2.7.x before 2.7.3, and 3.x before 3.0.1 does not properly address XML round-trip issues. An incorrect document can be produced after parsing and serializing.
gitlab/gem/rexml/CVE-2021-28965
Improper Restriction of XML External Entity Reference
The REXML gem does not properly address XML round-trip issues. An incorrect document can be produced after parsing and serializing.