diff --git a/src/wp-admin/includes/class-wp-list-table.php b/src/wp-admin/includes/class-wp-list-table.php
index b8631d17a2d7b..c7c38a3561e75 100644
--- a/src/wp-admin/includes/class-wp-list-table.php
+++ b/src/wp-admin/includes/class-wp-list-table.php
@@ -176,6 +176,7 @@ public function __construct( $args = array() ) {
 	 * Makes private properties readable for backward compatibility.
 	 *
 	 * @since 4.0.0
+	 * @since 6.4.0 Getting a dynamic property is deprecated.
 	 *
 	 * @param string $name Property to get.
 	 * @return mixed Property.
@@ -184,27 +185,42 @@ public function __get( $name ) {
 		if ( in_array( $name, $this->compat_fields, true ) ) {
 			return $this->$name;
 		}
+
+		trigger_error(
+			"The property `{$name}` is not defined. Getting a dynamic (undefined) property is " .
+			'deprecated since version 6.4.0! Instead, define the property on the class.',
+			E_USER_DEPRECATED
+		);
+		return null;
 	}
 
 	/**
 	 * Makes private properties settable for backward compatibility.
 	 *
 	 * @since 4.0.0
+	 * @since 6.4.0 Setting a dynamic property is deprecated.
 	 *
 	 * @param string $name  Property to check if set.
 	 * @param mixed  $value Property value.
-	 * @return mixed Newly-set property.
 	 */
 	public function __set( $name, $value ) {
 		if ( in_array( $name, $this->compat_fields, true ) ) {
-			return $this->$name = $value;
+			$this->$name = $value;
+			return;
 		}
+
+		trigger_error(
+			"The property `{$name}` is not defined. Setting a dynamic (undefined) property is " .
+			'deprecated since version 6.4.0! Instead, define the property on the class.',
+			E_USER_DEPRECATED
+		);
 	}
 
 	/**
 	 * Makes private properties checkable for backward compatibility.
 	 *
 	 * @since 4.0.0
+	 * @since 6.4.0 Checking a dynamic property is deprecated.
 	 *
 	 * @param string $name Property to check if set.
 	 * @return bool Whether the property is a back-compat property and it is set.
@@ -214,6 +230,11 @@ public function __isset( $name ) {
 			return isset( $this->$name );
 		}
 
+		trigger_error(
+			"The property `{$name}` is not defined. Checking `isset()` on a dynamic (undefined) property " .
+			'is deprecated since version 6.4.0! Instead, define the property on the class.',
+			E_USER_DEPRECATED
+		);
 		return false;
 	}
 
@@ -221,13 +242,21 @@ public function __isset( $name ) {
 	 * Makes private properties un-settable for backward compatibility.
 	 *
 	 * @since 4.0.0
+	 * @since 6.4.0 Unsetting a dynamic property is deprecated.
 	 *
 	 * @param string $name Property to unset.
 	 */
 	public function __unset( $name ) {
 		if ( in_array( $name, $this->compat_fields, true ) ) {
 			unset( $this->$name );
+			return;
 		}
+
+		trigger_error(
+			"A property `{$name}` is not defined. Unsetting a dynamic (undefined) property is " .
+			'deprecated since version 6.4.0! Instead, define the property on the class.',
+			E_USER_DEPRECATED
+		);
 	}
 
 	/**
diff --git a/tests/phpunit/tests/admin/wpListTable.php b/tests/phpunit/tests/admin/wpListTable.php
index b9ada05365b88..3b24cc5d90d89 100644
--- a/tests/phpunit/tests/admin/wpListTable.php
+++ b/tests/phpunit/tests/admin/wpListTable.php
@@ -361,4 +361,160 @@ public function data_get_views_links_doing_it_wrong() {
 			),
 		);
 	}
+
+	/**
+	 * @dataProvider data_compat_fields
+	 * @ticket 58896
+	 *
+	 * @covers WP_List_Table::__get()
+	 *
+	 * @param string $property_name Property name to get.
+	 * @param mixed $expected       Expected value.
+	 */
+	public function test_should_get_compat_fields_defined_property( $property_name, $expected ) {
+		$list_table = new WP_List_Table( array( 'plural' => '_wp_tests__get' ) );
+
+		if ( 'screen' === $property_name ) {
+			$this->assertInstanceOf( $expected, $list_table->$property_name );
+		} else {
+			$this->assertSame( $expected, $list_table->$property_name );
+		}
+	}
+
+	/**
+	 * @ticket 58896
+	 *
+	 * @covers WP_List_Table::__get()
+	 */
+	public function test_should_throw_deprecation_when_getting_dynamic_property() {
+		$this->expectDeprecation();
+		$this->expectDeprecationMessage(
+			'The property `undefined_property` is not defined. Getting a dynamic (undefined) property is ' .
+			'deprecated since version 6.4.0! Instead, define the property on the class.'
+		);
+		$this->assertNull( $this->list_table->undefined_property, 'Getting a dynamic property should return null from WP_List_Table::__get()' );
+	}
+
+	/**
+	 * @dataProvider data_compat_fields
+	 * @ticket 58896
+	 *
+	 * @covers WP_List_Table::__set()
+	 *
+	 * @param string $property_name Property name to set.
+	 */
+	public function test_should_set_compat_fields_defined_property( $property_name ) {
+		$value                            = uniqid();
+		$this->list_table->$property_name = $value;
+
+		$this->assertSame( $value, $this->list_table->$property_name );
+	}
+
+	/**
+	 * @ticket 58896
+	 *
+	 * @covers WP_List_Table::__set()
+	 */
+	public function test_should_throw_deprecation_when_setting_dynamic_property() {
+		$this->expectDeprecation();
+		$this->expectDeprecationMessage(
+			'The property `undefined_property` is not defined. Setting a dynamic (undefined) property is ' .
+			'deprecated since version 6.4.0! Instead, define the property on the class.'
+		);
+		$this->list_table->undefined_property = 'some value';
+	}
+
+	/**
+	 * @dataProvider data_compat_fields
+	 * @ticket 58896
+	 *
+	 * @covers WP_List_Table::__isset()
+	 *
+	 * @param string $property_name Property name to check.
+	 * @param mixed $expected       Expected value.
+	 */
+	public function test_should_isset_compat_fields_defined_property( $property_name, $expected ) {
+		$actual = isset( $this->list_table->$property_name );
+		if ( is_null( $expected ) ) {
+			$this->assertFalse( $actual );
+		} else {
+			$this->assertTrue( $actual );
+		}
+	}
+
+	/**
+	 * @ticket 58896
+	 *
+	 * @covers WP_List_Table::__isset()
+	 */
+	public function test_should_throw_deprecation_when_isset_of_dynamic_property() {
+		$this->expectDeprecation();
+		$this->expectDeprecationMessage(
+			'The property `undefined_property` is not defined. Checking `isset()` on a dynamic (undefined) property ' .
+			'is deprecated since version 6.4.0! Instead, define the property on the class.'
+		);
+		$this->assertFalse( isset( $this->list_table->undefined_property ), 'Checking a dyanmic property should return false from WP_List_Table::__isset()' );
+	}
+
+	/**
+	 * @dataProvider data_compat_fields
+	 * @ticket 58896
+	 *
+	 * @covers WP_List_Table::__unset()
+	 *
+	 * @param string $property_name Property name to unset.
+	 */
+	public function test_should_unset_compat_fields_defined_property( $property_name ) {
+		unset( $this->list_table->$property_name );
+		$this->assertFalse( isset( $this->list_table->$property_name ) );
+	}
+
+	/**
+	 * @ticket 58896
+	 *
+	 * @covers WP_List_Table::__unset()
+	 */
+	public function test_should_throw_deprecation_when_unset_of_dynamic_property() {
+		$this->expectDeprecation();
+		$this->expectDeprecationMessage(
+			'A property `undefined_property` is not defined. Unsetting a dynamic (undefined) property is ' .
+			'deprecated since version 6.4.0! Instead, define the property on the class.'
+		);
+		unset( $this->list_table->undefined_property );
+	}
+
+	/**
+	 * Data provider.
+	 *
+	 * @return array
+	 */
+	public function data_compat_fields() {
+		return array(
+			'_args'            => array(
+				'property_name' => '_args',
+				'expected'      => array(
+					'plural'   => '_wp_tests__get',
+					'singular' => '',
+					'ajax'     => false,
+					'screen'   => null,
+				),
+			),
+			'_pagination_args' => array(
+				'property_name' => '_pagination_args',
+				'expected'      => array(),
+			),
+			'screen'           => array(
+				'property_name' => 'screen',
+				'expected'      => WP_Screen::class,
+			),
+			'_actions'         => array(
+				'property_name' => '_actions',
+				'expected'      => null,
+			),
+			'_pagination'      => array(
+				'property_name' => '_pagination',
+				'expected'      => null,
+			),
+		);
+	}
 }