diff --git a/core/src/main/java/org/springframework/security/provisioning/JdbcUserDetailsManager.java b/core/src/main/java/org/springframework/security/provisioning/JdbcUserDetailsManager.java
index d6a5b7c8878..291f15f3223 100644
--- a/core/src/main/java/org/springframework/security/provisioning/JdbcUserDetailsManager.java
+++ b/core/src/main/java/org/springframework/security/provisioning/JdbcUserDetailsManager.java
@@ -30,6 +30,7 @@
 import org.springframework.core.log.LogMessage;
 import org.springframework.dao.IncorrectResultSizeDataAccessException;
 import org.springframework.jdbc.core.PreparedStatementSetter;
+import org.springframework.jdbc.core.RowMapper;
 import org.springframework.security.access.AccessDeniedException;
 import org.springframework.security.authentication.AuthenticationManager;
 import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
@@ -156,6 +157,10 @@ public class JdbcUserDetailsManager extends JdbcDaoImpl implements UserDetailsMa
 
 	private UserCache userCache = new NullUserCache();
 
+	private RowMapper<UserDetails> userDetailsMapper = this::mapToUser;
+
+	private RowMapper<GrantedAuthority> grantedAuthorityMapper = this::mapToGrantedAuthority;
+
 	public JdbcUserDetailsManager() {
 	}
 
@@ -163,6 +168,37 @@ public JdbcUserDetailsManager(DataSource dataSource) {
 		setDataSource(dataSource);
 	}
 
+	/**
+	 * Sets the {@code RowMapper} to convert each user result row into a
+	 * {@link UserDetails} object.
+	 *
+	 * The default mapper expects columns with names like 'username', 'password',
+	 * 'enabled', etc., and maps them directly to the corresponding UserDetails
+	 * properties.
+	 * @param mapper the {@code RowMapper} to use for mapping rows in the database, must
+	 * not be null
+	 * @since 6.5
+	 */
+	public void setUserDetailsMapper(RowMapper<UserDetails> mapper) {
+		Assert.notNull(mapper, "userDetailsMapper cannot be null");
+		this.userDetailsMapper = mapper;
+	}
+
+	/**
+	 * Sets the {@code RowMapper} to convert each authority result row into a
+	 * {@link GrantedAuthority} object.
+	 *
+	 * The default mapper expects columns with names like 'authority' or 'role', and maps
+	 * them directly to SimpleGrantedAuthority objects.
+	 * @param mapper the {@code RowMapper} to use for mapping rows in the database to
+	 * GrantedAuthority objects, must not be null
+	 * @since 6.5
+	 */
+	public void setGrantedAuthorityMapper(RowMapper<GrantedAuthority> mapper) {
+		Assert.notNull(mapper, "grantedAuthorityMapper cannot be null");
+		this.grantedAuthorityMapper = mapper;
+	}
+
 	@Override
 	protected void initDao() throws ApplicationContextException {
 		if (this.authenticationManager == null) {
@@ -178,7 +214,7 @@ protected void initDao() throws ApplicationContextException {
 	 */
 	@Override
 	protected List<UserDetails> loadUsersByUsername(String username) {
-		return getJdbcTemplate().query(getUsersByUsernameQuery(), this::mapToUser, username);
+		return getJdbcTemplate().query(getUsersByUsernameQuery(), this.userDetailsMapper, username);
 	}
 
 	private UserDetails mapToUser(ResultSet rs, int rowNum) throws SQLException {
@@ -387,7 +423,7 @@ public List<GrantedAuthority> findGroupAuthorities(String groupName) {
 		this.logger.debug("Loading authorities for group '" + groupName + "'");
 		Assert.hasText(groupName, "groupName should have text");
 		return getJdbcTemplate().query(this.groupAuthoritiesSql, new String[] { groupName },
-				this::mapToGrantedAuthority);
+				this.grantedAuthorityMapper);
 	}
 
 	private GrantedAuthority mapToGrantedAuthority(ResultSet rs, int rowNum) throws SQLException {
diff --git a/core/src/test/java/org/springframework/security/provisioning/JdbcUserDetailsManagerTests.java b/core/src/test/java/org/springframework/security/provisioning/JdbcUserDetailsManagerTests.java
index 67d0c83fa59..65b1d4b1c45 100644
--- a/core/src/test/java/org/springframework/security/provisioning/JdbcUserDetailsManagerTests.java
+++ b/core/src/test/java/org/springframework/security/provisioning/JdbcUserDetailsManagerTests.java
@@ -16,6 +16,7 @@
 
 package org.springframework.security.provisioning;
 
+import java.sql.SQLException;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
@@ -28,6 +29,7 @@
 import org.junit.jupiter.api.Test;
 
 import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.jdbc.core.RowMapper;
 import org.springframework.security.PopulatedDatabase;
 import org.springframework.security.TestDataSource;
 import org.springframework.security.access.AccessDeniedException;
@@ -48,14 +50,16 @@
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
 import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyInt;
 import static org.mockito.BDDMockito.given;
-import static org.mockito.Mockito.mock;
-import static org.mockito.Mockito.verify;
+import static org.mockito.BDDMockito.mock;
+import static org.mockito.BDDMockito.verify;
 
 /**
  * Tests for {@link JdbcUserDetailsManager}
  *
  * @author Luke Taylor
+ * @author dae won
  */
 public class JdbcUserDetailsManagerTests {
 
@@ -365,6 +369,42 @@ public void createNewAuthenticationUsesNullPasswordToKeepPassordsSave() {
 		assertThat(updatedAuth.getCredentials()).isNull();
 	}
 
+	@Test
+	public void setUserDetailsMapperWithNullMapperThrowsException() {
+		assertThatExceptionOfType(IllegalArgumentException.class)
+			.isThrownBy(() -> this.manager.setUserDetailsMapper(null))
+			.withMessage("userDetailsMapper cannot be null");
+	}
+
+	@Test
+	public void setUserDetailsMapperWithMockMapper() throws SQLException {
+		RowMapper<UserDetails> mockMapper = mock(RowMapper.class);
+		given(mockMapper.mapRow(any(), anyInt())).willReturn(joe);
+		this.manager.setUserDetailsMapper(mockMapper);
+		insertJoe();
+		UserDetails newJoe = this.manager.loadUserByUsername("joe");
+		assertThat(joe).isEqualTo(newJoe);
+		verify(mockMapper).mapRow(any(), anyInt());
+	}
+
+	@Test
+	public void setGrantedAuthorityMapperWithNullMapperThrowsException() {
+		assertThatExceptionOfType(IllegalArgumentException.class)
+			.isThrownBy(() -> this.manager.setGrantedAuthorityMapper(null))
+			.withMessage("grantedAuthorityMapper cannot be null");
+	}
+
+	@Test
+	public void setGrantedAuthorityMapperWithMockMapper() throws SQLException {
+		RowMapper<GrantedAuthority> mockMapper = mock(RowMapper.class);
+		GrantedAuthority mockAuthority = new SimpleGrantedAuthority("ROLE_MOCK");
+		given(mockMapper.mapRow(any(), anyInt())).willReturn(mockAuthority);
+		this.manager.setGrantedAuthorityMapper(mockMapper);
+		List<GrantedAuthority> authGroup = this.manager.findGroupAuthorities("GROUP_0");
+		assertThat(authGroup.get(0)).isEqualTo(mockAuthority);
+		verify(mockMapper).mapRow(any(), anyInt());
+	}
+
 	private Authentication authenticateJoe() {
 		UsernamePasswordAuthenticationToken auth = UsernamePasswordAuthenticationToken.authenticated("joe", "password",
 				joe.getAuthorities());