Gettext override translations <= 1.0.1 is vulnerable to Authenticated Stored Cross-Site Scripting (XSS) vulnerability

The Gettext override translations plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the ‘validconstant’ function in versions up to, and including, 1.0.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.