diff --git a/lms/djangoapps/instructor/views/api.py b/lms/djangoapps/instructor/views/api.py
index 7ca1e70467b0..1aa40b5e3376 100644
--- a/lms/djangoapps/instructor/views/api.py
+++ b/lms/djangoapps/instructor/views/api.py
@@ -105,7 +105,9 @@
 from lms.djangoapps.instructor_task.api_helper import AlreadyRunningError, QueueConnectionError
 from lms.djangoapps.instructor_task.data import InstructorTaskTypes
 from lms.djangoapps.instructor_task.models import ReportStore
-from lms.djangoapps.instructor.views.serializer import RoleNameSerializer, UserSerializer, AccessSerializer
+from lms.djangoapps.instructor.views.serializer import (
+    AccessSerializer, RoleNameSerializer, ShowStudentExtensionSerializer, UserSerializer
+)
 from openedx.core.djangoapps.content.course_overviews.models import CourseOverview
 from openedx.core.djangoapps.course_groups.cohorts import add_user_to_cohort, is_course_cohorted
 from openedx.core.djangoapps.course_groups.models import CourseUserGroup
@@ -2979,20 +2981,50 @@ def show_unit_extensions(request, course_id):
     return JsonResponse(dump_block_extensions(course, unit))
 
 
-@handle_dashboard_error
-@require_POST
-@ensure_csrf_cookie
-@cache_control(no_cache=True, no_store=True, must_revalidate=True)
-@require_course_permission(permissions.GIVE_STUDENT_EXTENSION)
-@require_post_params('student')
-def show_student_extensions(request, course_id):
+@method_decorator(cache_control(no_cache=True, no_store=True, must_revalidate=True), name='dispatch')
+class ShowStudentExtensions(APIView):
     """
     Shows all of the due date extensions granted to a particular student in a
     particular course.
     """
-    student = require_student_from_identifier(request.POST.get('student'))
-    course = get_course_by_id(CourseKey.from_string(course_id))
-    return JsonResponse(dump_student_extensions(course, student))
+    permission_classes = (IsAuthenticated, permissions.InstructorPermission)
+    serializer_class = ShowStudentExtensionSerializer
+    permission_name = permissions.GIVE_STUDENT_EXTENSION
+
+    @method_decorator(ensure_csrf_cookie)
+    def post(self, request, course_id):
+        """
+        Handles POST requests to retrieve due date extensions for a specific student
+        within a specified course.
+
+        Parameters:
+        - `request`: The HTTP request object containing user-submitted data.
+        - `course_id`: The ID of the course for which the extensions are being queried.
+
+        Data expected in the request:
+        - `student`: A required field containing the identifier of the student for whom
+          the due date extensions are being retrieved. This data is extracted from the
+          request body.
+
+        Returns:
+        - A JSON response containing the details of the due date extensions granted to
+          the specified student in the specified course.
+        """
+        data = {
+            'student': request.data.get('student')
+        }
+        serializer_data = self.serializer_class(data=data)
+
+        if not serializer_data.is_valid():
+            return HttpResponseBadRequest(reason=serializer_data.errors)
+
+        student = serializer_data.validated_data.get('student')
+        if not student:
+            response_payload = f'Could not find student matching identifier: {request.data.get("student")}'
+            return JsonResponse({'error': response_payload}, status=400)
+
+        course = get_course_by_id(CourseKey.from_string(course_id))
+        return Response(dump_student_extensions(course, student))
 
 
 def _split_input_list(str_list):
diff --git a/lms/djangoapps/instructor/views/api_urls.py b/lms/djangoapps/instructor/views/api_urls.py
index c0e12e46756d..18da0b63b218 100644
--- a/lms/djangoapps/instructor/views/api_urls.py
+++ b/lms/djangoapps/instructor/views/api_urls.py
@@ -53,7 +53,7 @@
     path('change_due_date', api.change_due_date, name='change_due_date'),
     path('reset_due_date', api.reset_due_date, name='reset_due_date'),
     path('show_unit_extensions', api.show_unit_extensions, name='show_unit_extensions'),
-    path('show_student_extensions', api.show_student_extensions, name='show_student_extensions'),
+    path('show_student_extensions', api.ShowStudentExtensions.as_view(), name='show_student_extensions'),
 
     # proctored exam downloads...
     path('get_proctored_exam_results', api.get_proctored_exam_results, name='get_proctored_exam_results'),
diff --git a/lms/djangoapps/instructor/views/serializer.py b/lms/djangoapps/instructor/views/serializer.py
index 463f05ad45b8..0697bed6832d 100644
--- a/lms/djangoapps/instructor/views/serializer.py
+++ b/lms/djangoapps/instructor/views/serializer.py
@@ -59,3 +59,21 @@ def validate_unique_student_identifier(self, value):
             return None
 
         return user
+
+
+class ShowStudentExtensionSerializer(serializers.Serializer):
+    """
+    Serializer for validating and processing the student identifier.
+    """
+    student = serializers.CharField(write_only=True, required=True)
+
+    def validate_student(self, value):
+        """
+        Validate that the student corresponds to an existing user.
+        """
+        try:
+            user = get_student_from_identifier(value)
+        except User.DoesNotExist:
+            return None
+
+        return user