diff --git a/atlassian/confluence/cloud/__init__.py b/atlassian/confluence/cloud/__init__.py
index 24ad4b6a0..afad9f4d0 100644
--- a/atlassian/confluence/cloud/__init__.py
+++ b/atlassian/confluence/cloud/__init__.py
@@ -640,8 +640,12 @@ def get_users(self, **kwargs):
         return self.get("rest/api/user", **kwargs)
 
     def get_user(self, user_id, **kwargs):
-        """Get user by ID."""
-        return self.get(f"rest/api/user/{user_id}", **kwargs)
+        """Get user by account ID.
+
+        :param user_id: the user's account ID
+        """
+        params = {**(kwargs.pop("params", None) or {}), "accountId": user_id}
+        return self.get("rest/api/user", params=params, **kwargs)
 
     def get_current_user(self, **kwargs):
         """Get current user."""
diff --git a/tests/confluence/test_confluence_cloud.py b/tests/confluence/test_confluence_cloud.py
index da9ef56ae..ed2816a5e 100644
--- a/tests/confluence/test_confluence_cloud.py
+++ b/tests/confluence/test_confluence_cloud.py
@@ -694,10 +694,31 @@ def test_get_users(self, mock_get, confluence_cloud):
     @patch.object(ConfluenceCloud, "get")
     def test_get_user(self, mock_get, confluence_cloud):
         """Test get_user method."""
-        mock_get.return_value = {"id": "user1", "name": "Test User"}
+        mock_get.return_value = {"accountId": "user1", "displayName": "Test User"}
         result = confluence_cloud.get_user("user1")
-        mock_get.assert_called_once_with("rest/api/user/user1", **{})
-        assert result == {"id": "user1", "name": "Test User"}
+        mock_get.assert_called_once_with("rest/api/user", params={"accountId": "user1"})
+        assert result == {"accountId": "user1", "displayName": "Test User"}
+
+    @patch.object(ConfluenceCloud, "get")
+    def test_get_user_keeps_extra_params(self, mock_get, confluence_cloud):
+        mock_get.return_value = {"accountId": "user1"}
+
+        assert confluence_cloud.get_user("user1", params={"expand": "personalSpace"}) == {"accountId": "user1"}
+        mock_get.assert_called_once_with("rest/api/user", params={"expand": "personalSpace", "accountId": "user1"})
+
+    def test_get_user_requests_wiki_user_endpoint(self, confluence_cloud):
+        response = Response()
+        response.status_code = 200
+        response._content = b'{"accountId": "557058:f58131cb", "displayName": "Test User"}'
+
+        with patch.object(confluence_cloud._session, "request", return_value=response) as mock_request:
+            assert confluence_cloud.get_user("557058:f58131cb") == {
+                "accountId": "557058:f58131cb",
+                "displayName": "Test User",
+            }
+
+        url = mock_request.call_args.kwargs["url"]
+        assert url == "https://test.atlassian.net/wiki/rest/api/user?accountId=557058%3Af58131cb"
 
     @patch.object(ConfluenceCloud, "get")
     def test_get_current_user(self, mock_get, confluence_cloud):