REST batch route confusion
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A malformed sub-request path is appended to one internal array but not a parallel one due to a continue statement, desynchronizing array indices so a later request is dispatched under the wrong handler, bypassing validation and permission checks.
serve_batch_request_v1() builds parallel $matches and $validation arrays indexed by offset; a sub-request failing wp_parse_url() is appended to $validation but not $matches, desyncing the arrays so a sub-request is dispatched under a different handler
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