Getting exposed

SELECT * FROM gallery2 WHERE topic_id="1575873" UNION SELECT * FROM gallery2 WHERE topic_id="265774" UNION SELECT * FROM gallery2 WHERE topic_id="1182782" UNION SELECT * FROM gallery2 WHERE topic_id="1631299" UNION SELECT * FROM gallery2 WHERE topic_id="187595" UNION SELECT * FROM gallery2 WHERE topic_id="1001492" UNION SELECT * FROM gallery2 WHERE topic_id="21558" UNION SELECT * FROM gallery2 WHERE topic_id="1136413" UNION SELECT * FROM gallery2 WHERE topic_id="479510" UNION SELECT * FROM gallery2 WHERE topic_id="1713324" UNION SELECT * FROM gallery2 WHERE topic_id="1169407" UNION SELECT * FROM gallery2 WHERE topic_id="1663571" UNION SELECT * FROM gallery2 WHERE topic_id="1402659" UNION SELECT * FROM gallery2 WHERE topic_id="1182497" UNION SELECT * FROM gallery2 WHERE topic_id="288070" UNION SELECT * FROM gallery2 WHERE topic_id="472066"