Wosner was born in Vienna, Austro-Hungary and studied in the Yeshivas Chachmei Lublin of Poland led by Rabbi Meir Shapiro. He was also a student of Rabbi Shimon of Zelicov who was the official supervisor at the Yeshiva. In Vienna, he had known and befriended the Rabbi Chanoch Dov Padwa of Galicia.
Wosner's background highlights his education at the Yeshivas Chachmei Lublin under Rabbi Meir Shapiro and Rabbi Shimon of Zelicov, both influential figures in Jewish religious life. His friendship with Rabbi Chanoch Dov Padwa of Galicia further emphasizes his connections within the Jewish community during this period.