CVE-2021-3822: 
JavaScript vulnerability analysis and mitigation

A vulnerability was identified in the jsoneditor library related to inefficient regex pattern for handling return characters. The issue was assigned CVE-2021-3822 and was discovered in 2021 (GitHub Commit).

The vulnerability involved an inefficient regular expression pattern used to replace return characters in the getInnerText function. The original implementation used the pattern /\s*\n\s*/g which was later fixed to /(|^)\s*\n\s*(|$)/g to more efficiently handle whitespace and return characters (GitHub Commit).

The issue was addressed in version 9.5.6 of jsoneditor with a patch that improved the regex pattern for handling return characters (GitHub Commit).