Fixes a redirect vulnerability when the user opens the pgAdmin URL. F…

…ixes #5343

docs/en_US/release_notes_6_14.rst

@@ -44,3 +44,4 @@ Bug fixes
   | `Issue #5323 <https://github.com/postgres/pgadmin4/issues/5323>`_ -  Replace the language selection 'Brazilian' with 'Portuguese (Brazilian). (RM #7693)
   | `Issue #5325 <https://github.com/postgres/pgadmin4/issues/5325>`_ -  Fixed an issue where server names with special characters are not displayed correctly in the process tab. (RM #7695)
   | `Issue #5333 <https://github.com/postgres/pgadmin4/issues/5333>`_ -  Fixed an issue where ERD throws an error if variable is added to the column. (RM #7709)
+  | `Issue #5343 <https://github.com/postgres/pgadmin4/issues/5343>`_ -  Fixes a redirect vulnerability when the user opens the pgAdmin URL.

web/pgadmin/authenticate/__init__.py

@@ -16,11 +16,10 @@
     session, redirect
 from flask_babel import gettext
 from flask_security.views import _security
-from flask_security.utils import get_post_logout_redirect, \
-    get_post_login_redirect, logout_user
+from flask_security.utils import get_post_logout_redirect, logout_user
 
 from pgadmin.model import db, User
-from pgadmin.utils import PgAdminModule
+from pgadmin.utils import PgAdminModule, get_safe_post_login_redirect
 from pgadmin.utils.constants import KERBEROS, INTERNAL, OAUTH2, LDAP
 from pgadmin.authenticate.registry import AuthSourceRegistry
 
@@ -145,7 +144,7 @@ def login():
 
         if 'auth_obj' in session:
             session.pop('auth_obj')
-        return redirect(get_post_login_redirect())
+        return redirect(get_safe_post_login_redirect())
 
     elif isinstance(msg, Response):
         return msg

web/pgadmin/authenticate/oauth2.py

@@ -16,14 +16,13 @@
     redirect, Flask, flash
 from flask_babel import gettext
 from flask_security import login_user, current_user
-from flask_security.utils import get_post_logout_redirect, \
-    get_post_login_redirect, logout_user
+from flask_security.utils import get_post_logout_redirect, logout_user
 
 from pgadmin.authenticate.internal import BaseAuthentication
 from pgadmin.model import User
 from pgadmin.tools.user_management import create_user
 from pgadmin.utils.constants import OAUTH2
-from pgadmin.utils import PgAdminModule
+from pgadmin.utils import PgAdminModule, get_safe_post_login_redirect
 from pgadmin.utils.csrf import pgCSRFProtect
 from pgadmin.model import db
 
@@ -58,12 +57,12 @@ def oauth_authorize():
             session['auth_source_manager'] = auth_obj.as_dict()
             if 'auth_obj' in session:
                 session.pop('auth_obj')
-            return redirect(get_post_login_redirect())
+            return redirect(get_safe_post_login_redirect())
         if 'auth_obj' in session:
             session.pop('auth_obj')
         logout_user()
         flash(msg, 'danger')
-        return redirect(get_post_login_redirect())
+        return redirect(get_safe_post_login_redirect())
 
     @blueprint.route('/logout', endpoint="logout",
                      methods=['GET', 'POST'])

web/pgadmin/utils/__init__.py

@@ -14,9 +14,10 @@
 from collections import defaultdict
 from operator import attrgetter
 
-from flask import Blueprint, current_app
+from flask import Blueprint, current_app, url_for
 from flask_babel import gettext
 from flask_security import current_user, login_required
+from flask_security.utils import get_post_login_redirect
 from threading import Lock
 
 from .paths import get_storage_directory
@@ -831,3 +832,14 @@ def hard_reset(self):
 
             if user is not None:
                 del self.users[current_user.id]
+
+
+def get_safe_post_login_redirect():
+    allow_list = [
+        url_for('browser.index')
+    ]
+    url = get_post_login_redirect()
+    if url in allow_list:
+        return url
+
+    return "/"