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This makes it possible for authenticated attackers, with Author-level access and above, to inject PHP expressions that execute on every front-end page view, enabling boolean-oracle exfiltration of WordPress site configuration data — including admin email address, default role, and arbitrary `get_option`, `get_user_meta`, and `get_post_meta` values — via the plugin's allowlisted-function sandbox, which escalates to unrestricted code execution if any installed plugin extends the `widgetopts_allowed_php_functions` filter. Contributors can also exploit this vulnerability when their submitted post is later published by an administrator; notably, the injected payload executes for all site visitors, including unauthenticated users, because a trust-flag mechanism introduced in version 4.2.6 causes `widgetopts_safe_eval_trusted()` to bypass its non-admin short-circuit at every legacy render callsite. 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