diff --git a/server/bundles/io.cloudbeaver.service.admin/src/io/cloudbeaver/service/admin/impl/WebServiceAdmin.java b/server/bundles/io.cloudbeaver.service.admin/src/io/cloudbeaver/service/admin/impl/WebServiceAdmin.java
index 80b9e6f206..7ee943724e 100644
--- a/server/bundles/io.cloudbeaver.service.admin/src/io/cloudbeaver/service/admin/impl/WebServiceAdmin.java
+++ b/server/bundles/io.cloudbeaver.service.admin/src/io/cloudbeaver/service/admin/impl/WebServiceAdmin.java
@@ -51,6 +51,7 @@ import org.jkiss.dbeaver.model.secret.DBSSecretController;
 import org.jkiss.dbeaver.model.security.*;
 import org.jkiss.dbeaver.model.security.user.SMTeam;
 import org.jkiss.dbeaver.model.security.user.SMUser;
+import org.jkiss.dbeaver.utils.GeneralUtils;
 import org.jkiss.utils.CommonUtils;
 
 import java.text.MessageFormat;
@@ -162,6 +163,11 @@ public class WebServiceAdmin implements DBWServiceAdmin {
             throw new DBWebException("Empty user name");
         }
         String userId = userName.toLowerCase();
+        try {
+            GeneralUtils.validateResourceNameUnconditionally(userId);
+        } catch (DBException e) {
+            throw new DBWebException(e.getMessage(), e);
+        }
         webSession.addInfoMessage("Create new user - " + userId);
 
         try {
@@ -223,6 +229,12 @@ public class WebServiceAdmin implements DBWServiceAdmin {
         if (user == null) {
             throw new DBWebException("Admin user is not found");
         }
+        try {
+            GeneralUtils.validateResourceNameUnconditionally(teamId);
+        } catch (DBException e) {
+            throw new DBWebException(e.getMessage(), e);
+        }
+
         webSession.addInfoMessage("Create new team - " + teamId);
         try {
             SMTeam newTeam = webSession.getAdminSecurityController().createTeam(
diff --git a/webapp/packages/plugin-authentication-administration/src/Administration/Users/Teams/TeamsForm/Options/TeamOptions.tsx b/webapp/packages/plugin-authentication-administration/src/Administration/Users/Teams/TeamsForm/Options/TeamOptions.tsx
index 3fe96e2d23..4936bf3e0f 100644
--- a/webapp/packages/plugin-authentication-administration/src/Administration/Users/Teams/TeamsForm/Options/TeamOptions.tsx
+++ b/webapp/packages/plugin-authentication-administration/src/Administration/Users/Teams/TeamsForm/Options/TeamOptions.tsx
@@ -1,13 +1,13 @@
 /*
  * CloudBeaver - Cloud Database Manager
- * Copyright (C) 2020-2024 DBeaver Corp and others
+ * Copyright (C) 2020-2025 DBeaver Corp and others
  *
  * Licensed under the Apache License, Version 2.0.
  * you may not use this file except in compliance with the License.
  */
 import { observer } from 'mobx-react-lite';
 
-import { Container, Group, InputField, Textarea, useAutoLoad, useResource, useTranslate } from '@cloudbeaver/core-blocks';
+import { Container, Group, InputField, Textarea, useAutoLoad, useCustomInputValidation, useResource, useTranslate } from '@cloudbeaver/core-blocks';
 import { ServerConfigResource } from '@cloudbeaver/core-root';
 import { type TabContainerPanelComponent, useTab, useTabState } from '@cloudbeaver/core-ui';
 
@@ -15,6 +15,7 @@ import type { TeamFormProps } from '../TeamsAdministrationFormService.js';
 import { Permissions } from './Permissions.js';
 import { TeamMetaParameters } from './TeamMetaParameters.js';
 import type { TeamOptionsFormPart } from './TeamOptionsFormPart.js';
+import { ENTITY_ID_VALIDATION } from '../../../shared/ENTITY_ID_VALIDATION.js';
 
 export const TeamOptions: TabContainerPanelComponent<TeamFormProps> = observer(function TeamOptions({ formState, tabId }) {
   const serverConfigResource = useResource(TeamOptions, ServerConfigResource, undefined);
@@ -26,10 +27,18 @@ export const TeamOptions: TabContainerPanelComponent<TeamFormProps> = observer(f
 
   useAutoLoad(TeamOptions, tabState, tab.selected && !loaded);
 
+  const idValidationRef = useCustomInputValidation<string>(value => {
+    if (!value.match(ENTITY_ID_VALIDATION)) {
+      return translate('plugin_authentication_administration_team_id_validation_error');
+    }
+
+    return null;
+  });
+
   return (
     <Container overflow>
       <Group small gap>
-        <InputField name="teamId" state={tabState.state} readOnly={edit || formState.isDisabled} required tiny fill>
+        <InputField ref={idValidationRef} name="teamId" state={tabState.state} readOnly={edit || formState.isDisabled} required tiny fill>
           {translate('administration_teams_team_id')}
         </InputField>
         <InputField name="teamName" state={tabState.state} readOnly={formState.isDisabled} required tiny fill>
diff --git a/webapp/packages/plugin-authentication-administration/src/Administration/Users/UserForm/Info/UserFormInfoCredentials.tsx b/webapp/packages/plugin-authentication-administration/src/Administration/Users/UserForm/Info/UserFormInfoCredentials.tsx
index c5136b7564..392284e6db 100644
--- a/webapp/packages/plugin-authentication-administration/src/Administration/Users/UserForm/Info/UserFormInfoCredentials.tsx
+++ b/webapp/packages/plugin-authentication-administration/src/Administration/Users/UserForm/Info/UserFormInfoCredentials.tsx
@@ -1,6 +1,6 @@
 /*
  * CloudBeaver - Cloud Database Manager
- * Copyright (C) 2020-2024 DBeaver Corp and others
+ * Copyright (C) 2020-2025 DBeaver Corp and others
  *
  * Licensed under the Apache License, Version 2.0.
  * you may not use this file except in compliance with the License.
@@ -22,6 +22,7 @@ import { isValuesEqual } from '@cloudbeaver/core-utils';
 
 import type { UserFormProps } from '../AdministrationUserFormService.js';
 import type { UserFormInfoPart } from './UserFormInfoPart.js';
+import { ENTITY_ID_VALIDATION } from '../../shared/ENTITY_ID_VALIDATION.js';
 
 const PASSWORD_PLACEHOLDER = '••••••';
 
@@ -44,6 +45,14 @@ export const UserFormInfoCredentials = observer<Props>(function UserFormInfoCred
     local = !editing || (!!userInfo.data && isLocalUser(userInfo.data));
   }
 
+  const usernameValidationRef = useCustomInputValidation<string>(value => {
+    if (!value.match(ENTITY_ID_VALIDATION)) {
+      return translate('plugin_authentication_administration_user_username_validation_error');
+    }
+
+    return null;
+  });
+
   const passwordRepeatRef = useCustomInputValidation<string>(value => {
     if (!isValuesEqual(value, tabState.state.password, null)) {
       return translate('authentication_user_passwords_not_match');
@@ -55,6 +64,7 @@ export const UserFormInfoCredentials = observer<Props>(function UserFormInfoCred
     <Container gap vertical>
       <GroupTitle keepSize>{translate('authentication_user_credentials')}</GroupTitle>
       <InputField
+        ref={usernameValidationRef}
         description={!editing ? translate('authentication_user_name_description') : undefined}
         type="text"
         name="userId"
diff --git a/webapp/packages/plugin-authentication-administration/src/Administration/Users/shared/ENTITY_ID_VALIDATION.ts b/webapp/packages/plugin-authentication-administration/src/Administration/Users/shared/ENTITY_ID_VALIDATION.ts
new file mode 100644
index 0000000000..6a2c8cd1d7
--- /dev/null
+++ b/webapp/packages/plugin-authentication-administration/src/Administration/Users/shared/ENTITY_ID_VALIDATION.ts
@@ -0,0 +1,9 @@
+/*
+ * CloudBeaver - Cloud Database Manager
+ * Copyright (C) 2020-2025 DBeaver Corp and others
+ *
+ * Licensed under the Apache License, Version 2.0.
+ * you may not use this file except in compliance with the License.
+ */
+
+export const ENTITY_ID_VALIDATION = /^(?!\.)[^\\/:\\"'<>|?*]+$/u;
diff --git a/webapp/packages/plugin-authentication-administration/src/locales/en.ts b/webapp/packages/plugin-authentication-administration/src/locales/en.ts
index 81d509de95..a1def90ca9 100644
--- a/webapp/packages/plugin-authentication-administration/src/locales/en.ts
+++ b/webapp/packages/plugin-authentication-administration/src/locales/en.ts
@@ -138,4 +138,13 @@ export default [
 
   ['plugin_authentication_administration_team_form_edit_label', 'Team editing form'],
   ['plugin_authentication_administration_user_form_edit_label', 'User editing form'],
+
+  [
+    'plugin_authentication_administration_user_username_validation_error',
+    "User's name may not contain the following symbols / : \" \\ ' <> | ? * and can't start with a dot",
+  ],
+  [
+    'plugin_authentication_administration_team_id_validation_error',
+    "Team's ID may not contain the following symbols / : \" \\ ' <> | ? * and can't start with a dot",
+  ],
 ];
diff --git a/webapp/packages/plugin-authentication-administration/src/locales/fr.ts b/webapp/packages/plugin-authentication-administration/src/locales/fr.ts
index b814c2c2d6..07ba216043 100644
--- a/webapp/packages/plugin-authentication-administration/src/locales/fr.ts
+++ b/webapp/packages/plugin-authentication-administration/src/locales/fr.ts
@@ -127,4 +127,13 @@ export default [
   ],
   ['plugin_authentication_administration_team_form_edit_label', 'Team editing form'],
   ['plugin_authentication_administration_user_form_edit_label', 'User editing form'],
+
+  [
+    'plugin_authentication_administration_user_username_validation_error',
+    "User's name may not contain the following symbols / : \" \\ ' <> | ? * and can't start with a dot",
+  ],
+  [
+    'plugin_authentication_administration_team_id_validation_error',
+    "Team's ID may not contain the following symbols / : \" \\ ' <> | ? * and can't start with a dot",
+  ],
 ];
diff --git a/webapp/packages/plugin-authentication-administration/src/locales/it.ts b/webapp/packages/plugin-authentication-administration/src/locales/it.ts
index e38ee293bf..8a7ebaa986 100644
--- a/webapp/packages/plugin-authentication-administration/src/locales/it.ts
+++ b/webapp/packages/plugin-authentication-administration/src/locales/it.ts
@@ -85,4 +85,13 @@ export default [
 
   ['plugin_authentication_administration_team_form_edit_label', 'Team editing form'],
   ['plugin_authentication_administration_user_form_edit_label', 'User editing form'],
+
+  [
+    'plugin_authentication_administration_user_username_validation_error',
+    "User's name may not contain the following symbols / : \" \\ ' <> | ? * and can't start with a dot",
+  ],
+  [
+    'plugin_authentication_administration_team_id_validation_error',
+    "Team's ID may not contain the following symbols / : \" \\ ' <> | ? * and can't start with a dot",
+  ],
 ];
diff --git a/webapp/packages/plugin-authentication-administration/src/locales/ru.ts b/webapp/packages/plugin-authentication-administration/src/locales/ru.ts
index 2d8a2b23a3..b8141837d2 100644
--- a/webapp/packages/plugin-authentication-administration/src/locales/ru.ts
+++ b/webapp/packages/plugin-authentication-administration/src/locales/ru.ts
@@ -146,4 +146,13 @@ export default [
 
   ['plugin_authentication_administration_team_form_edit_label', 'Форма редактирования команды'],
   ['plugin_authentication_administration_user_form_edit_label', 'Форма редактирования пользователя'],
+
+  [
+    'plugin_authentication_administration_user_username_validation_error',
+    'Имя пользователя не может содержать следующие символы / : " \\ \' <> | ? * и не может начинаться с точки',
+  ],
+  [
+    'plugin_authentication_administration_team_id_validation_error',
+    'ID команды не может содержать следующие символы / : " \\ \' <> | ? * и не может начинаться с точки',
+  ],
 ];
diff --git a/webapp/packages/plugin-authentication-administration/src/locales/vi.ts b/webapp/packages/plugin-authentication-administration/src/locales/vi.ts
index 71bef04fe9..1c102ada45 100644
--- a/webapp/packages/plugin-authentication-administration/src/locales/vi.ts
+++ b/webapp/packages/plugin-authentication-administration/src/locales/vi.ts
@@ -136,4 +136,13 @@ export default [
   ],
   ['plugin_authentication_administration_team_form_edit_label', 'Biểu mẫu chỉnh sửa nhóm'],
   ['plugin_authentication_administration_user_form_edit_label', 'Biểu mẫu chỉnh sửa người dùng'],
+
+  [
+    'plugin_authentication_administration_user_username_validation_error',
+    "User's name may not contain the following symbols / : \" \\ ' <> | ? * and can't start with a dot",
+  ],
+  [
+    'plugin_authentication_administration_team_id_validation_error',
+    "Team's ID may not contain the following symbols / : \" \\ ' <> | ? * and can't start with a dot",
+  ],
 ];
diff --git a/webapp/packages/plugin-authentication-administration/src/locales/zh.ts b/webapp/packages/plugin-authentication-administration/src/locales/zh.ts
index 98f5ab76ed..f93843625c 100644
--- a/webapp/packages/plugin-authentication-administration/src/locales/zh.ts
+++ b/webapp/packages/plugin-authentication-administration/src/locales/zh.ts
@@ -117,4 +117,13 @@ export default [
 
   ['plugin_authentication_administration_team_form_edit_label', 'Team editing form'],
   ['plugin_authentication_administration_user_form_edit_label', 'User editing form'],
+
+  [
+    'plugin_authentication_administration_user_username_validation_error',
+    "User's name may not contain the following symbols / : \" \\ ' <> | ? * and can't start with a dot",
+  ],
+  [
+    'plugin_authentication_administration_team_id_validation_error',
+    "Team's ID may not contain the following symbols / : \" \\ ' <> | ? * and can't start with a dot",
+  ],
 ];