diff --git a/rsconcept/frontend/src/app/Navigation/UserButton.tsx b/rsconcept/frontend/src/app/Navigation/UserButton.tsx
index c4f69e5d..bd00f10e 100644
--- a/rsconcept/frontend/src/app/Navigation/UserButton.tsx
+++ b/rsconcept/frontend/src/app/Navigation/UserButton.tsx
@@ -11,7 +11,6 @@ interface UserButtonProps {
 
 function UserButton({ onLogin, onClickUser }: UserButtonProps) {
   const { user, isAnonymous } = useAuthSuspense();
-  console.log(user);
   const adminMode = usePreferencesStore(state => state.adminMode);
   if (isAnonymous) {
     return (
diff --git a/rsconcept/frontend/src/backend/auth/api.ts b/rsconcept/frontend/src/backend/auth/api.ts
index 340a6eed..8f31b3d3 100644
--- a/rsconcept/frontend/src/backend/auth/api.ts
+++ b/rsconcept/frontend/src/backend/auth/api.ts
@@ -1,7 +1,7 @@
 import { queryOptions } from '@tanstack/react-query';
 import { z } from 'zod';
 
-import { axiosGet, axiosPost } from '@/backend/apiTransport';
+import { axiosGet, axiosPatch, axiosPost } from '@/backend/apiTransport';
 import { DELAYS } from '@/backend/configuration';
 import { ICurrentUser } from '@/models/user';
 import { errors, information } from '@/utils/labels';
@@ -22,10 +22,25 @@ export type IUserLoginDTO = z.infer<typeof UserLoginSchema>;
 /**
  * Represents data needed to update password for current user.
  */
-export interface IChangePasswordDTO {
-  old_password: string;
-  new_password: string;
-}
+export const ChangePasswordSchema = z
+  .object({
+    old_password: z.string().nonempty(errors.requiredField),
+    new_password: z.string().nonempty(errors.requiredField),
+    new_password2: z.string().nonempty(errors.requiredField)
+  })
+  .refine(schema => schema.new_password === schema.new_password2, {
+    path: ['new_password2'],
+    message: errors.passwordsMismatch
+  })
+  .refine(schema => schema.old_password !== schema.new_password, {
+    path: ['new_password'],
+    message: errors.passwordsSame
+  });
+
+/**
+ * Represents data needed to update password for current user.
+ */
+export type IChangePasswordDTO = z.infer<typeof ChangePasswordSchema>;
 
 /**
  * Represents password reset request data.
@@ -75,7 +90,7 @@ export const authApi = {
       request: { data: data }
     }),
   changePassword: (data: IChangePasswordDTO) =>
-    axiosPost({
+    axiosPatch({
       endpoint: '/users/api/change-password',
       request: {
         data: data,
diff --git a/rsconcept/frontend/src/backend/auth/useLogin.tsx b/rsconcept/frontend/src/backend/auth/useLogin.tsx
index 97a42704..49158e6c 100644
--- a/rsconcept/frontend/src/backend/auth/useLogin.tsx
+++ b/rsconcept/frontend/src/backend/auth/useLogin.tsx
@@ -1,5 +1,4 @@
 import { useMutation, useQueryClient } from '@tanstack/react-query';
-import { AxiosError } from 'axios';
 
 import { authApi, IUserLoginDTO } from './api';
 
@@ -12,8 +11,7 @@ export const useLogin = () => {
     onSuccess: () => client.resetQueries()
   });
   return {
-    login: (data: IUserLoginDTO, onSuccess?: () => void, onError?: (error: AxiosError) => void) =>
-      mutation.mutate(data, { onSuccess, onError }),
+    login: (data: IUserLoginDTO, onSuccess?: () => void) => mutation.mutate(data, { onSuccess }),
     isPending: mutation.isPending,
     error: mutation.error,
     reset: mutation.reset
diff --git a/rsconcept/frontend/src/components/ui/ErrorField.tsx b/rsconcept/frontend/src/components/ui/ErrorField.tsx
index ed937b2c..9788a422 100644
--- a/rsconcept/frontend/src/components/ui/ErrorField.tsx
+++ b/rsconcept/frontend/src/components/ui/ErrorField.tsx
@@ -1,17 +1,24 @@
+import clsx from 'clsx';
 import { FieldError, GlobalError } from 'react-hook-form';
 
-interface ErrorFieldProps {
+import { CProps } from '../props';
+
+interface ErrorFieldProps extends CProps.Styling {
   error?: FieldError | GlobalError;
 }
 
 /**
  * Displays an error message for input field.
  */
-function ErrorField({ error }: ErrorFieldProps) {
+function ErrorField({ error, className, ...restProps }: ErrorFieldProps): React.ReactElement | null {
   if (!error) {
     return null;
   }
-  return <div className='text-sm text-warn-600'>{error.message}</div>;
+  return (
+    <div className={clsx('text-sm text-warn-600 select-none', className)} {...restProps}>
+      {error.message}
+    </div>
+  );
 }
 
 export default ErrorField;
diff --git a/rsconcept/frontend/src/components/ui/TextInput.tsx b/rsconcept/frontend/src/components/ui/TextInput.tsx
index baf40ccd..b712f083 100644
--- a/rsconcept/frontend/src/components/ui/TextInput.tsx
+++ b/rsconcept/frontend/src/components/ui/TextInput.tsx
@@ -40,7 +40,7 @@ function TextInput({
     <div
       className={clsx(
         {
-          'flex flex-col gap-2': !dense,
+          'flex flex-col': !dense,
           'flex items-center gap-3': dense
         },
         dense && className
@@ -50,7 +50,7 @@ function TextInput({
       <input
         id={id}
         className={clsx(
-          'min-w-0 py-2',
+          'min-w-0 py-2 mt-2',
           'leading-tight truncate hover:text-clip',
           {
             'px-3': !noBorder || !disabled,
@@ -65,7 +65,7 @@ function TextInput({
         disabled={disabled}
         {...restProps}
       />
-      <ErrorField error={error} />
+      <ErrorField className='mt-1' error={error} />
     </div>
   );
 }
diff --git a/rsconcept/frontend/src/pages/LoginPage.tsx b/rsconcept/frontend/src/pages/LoginPage.tsx
index e6334a2f..4ed1112b 100644
--- a/rsconcept/frontend/src/pages/LoginPage.tsx
+++ b/rsconcept/frontend/src/pages/LoginPage.tsx
@@ -12,7 +12,6 @@ import { useAuthSuspense } from '@/backend/auth/useAuth';
 import { useLogin } from '@/backend/auth/useLogin';
 import ExpectedAnonymous from '@/components/ExpectedAnonymous';
 import { ErrorData } from '@/components/info/InfoError';
-import ErrorField from '@/components/ui/ErrorField';
 import SubmitButton from '@/components/ui/SubmitButton';
 import TextInput from '@/components/ui/TextInput';
 import TextURL from '@/components/ui/TextURL';
@@ -28,7 +27,6 @@ function LoginPage() {
     register,
     handleSubmit,
     clearErrors,
-    setError,
     resetField,
     formState: { errors }
   } = useForm({
@@ -37,25 +35,17 @@ function LoginPage() {
   });
 
   const { isAnonymous } = useAuthSuspense();
-  const { login, isPending, error: loginError, reset } = useLogin();
+  const { login, isPending, error: serverError, reset } = useLogin();
 
   function onSubmit(data: IUserLoginDTO) {
-    login(
-      data,
-      () => {
-        resetField('password');
-        if (router.canBack()) {
-          router.back();
-        } else {
-          router.push(urls.library);
-        }
-      },
-      error => {
-        if (axios.isAxiosError(error) && error.response && error.response.status === 400) {
-          setError('root', { message: 'На Портале отсутствует такое сочетание имени пользователя и пароля' });
-        }
+    login(data, () => {
+      resetField('password');
+      if (router.canBack()) {
+        router.back();
+      } else {
+        router.push(urls.library);
       }
-    );
+    });
   }
 
   function resetErrors() {
@@ -99,8 +89,7 @@ function LoginPage() {
         <TextURL text='Восстановить пароль...' href='/restore-password' />
         <TextURL text='Нет аккаунта? Зарегистрируйтесь...' href='/signup' />
       </div>
-      <ErrorField error={errors.root} />
-      <EscalateError error={loginError} />
+      {serverError ? <ServerError error={serverError} /> : null}
     </form>
   );
 }
@@ -108,13 +97,13 @@ function LoginPage() {
 export default LoginPage;
 
 // ====== Internals =========
-function EscalateError({ error }: { error: ErrorData }): React.ReactElement | null {
-  // TODO: rework error escalation mechanism. Probably make it global.
-  if (!error) {
-    return null;
-  }
+function ServerError({ error }: { error: ErrorData }): React.ReactElement | null {
   if (axios.isAxiosError(error) && error.response && error.response.status === 400) {
-    return null;
+    return (
+      <div className='text-sm select-text text-warn-600'>
+        На Портале отсутствует такое сочетание имени пользователя и пароля
+      </div>
+    );
   }
   throw error as Error;
 }
diff --git a/rsconcept/frontend/src/pages/RegisterPage/FormSignup.tsx b/rsconcept/frontend/src/pages/RegisterPage/FormSignup.tsx
index 6b5a8f58..26effbb8 100644
--- a/rsconcept/frontend/src/pages/RegisterPage/FormSignup.tsx
+++ b/rsconcept/frontend/src/pages/RegisterPage/FormSignup.tsx
@@ -39,8 +39,6 @@ function FormSignup() {
     resolver: zodResolver(UserSignupSchema)
   });
 
-  const isValid = acceptPrivacy && acceptRules;
-
   function resetErrors() {
     reset();
     clearErrors();
@@ -57,6 +55,7 @@ function FormSignup() {
   function onSubmit(data: IUserSignupDTO) {
     signup(data, createdUser => router.push(urls.login_hint(createdUser.username)));
   }
+
   return (
     <form
       className={clsx('cc-fade-in cc-column', 'mx-auto w-[36rem]', 'px-6 py-3')}
@@ -149,7 +148,12 @@ function FormSignup() {
       </div>
 
       <div className='flex justify-around my-3'>
-        <SubmitButton text='Регистрировать' className='min-w-[10rem]' loading={isPending || !isValid} />
+        <SubmitButton
+          text='Регистрировать'
+          className='min-w-[10rem]'
+          loading={isPending}
+          disabled={!acceptPrivacy || !acceptRules}
+        />
         <Button text='Назад' className='min-w-[10rem]' onClick={() => handleCancel()} />
       </div>
       {serverError ? <ServerError error={serverError} /> : null}
diff --git a/rsconcept/frontend/src/pages/UserProfilePage/EditorPassword.tsx b/rsconcept/frontend/src/pages/UserProfilePage/EditorPassword.tsx
index 2e6a2017..b01b3ac6 100644
--- a/rsconcept/frontend/src/pages/UserProfilePage/EditorPassword.tsx
+++ b/rsconcept/frontend/src/pages/UserProfilePage/EditorPassword.tsx
@@ -1,92 +1,77 @@
 'use client';
 
+import { zodResolver } from '@hookform/resolvers/zod';
 import axios from 'axios';
 import clsx from 'clsx';
-import { useEffect, useState } from 'react';
-import { toast } from 'react-toastify';
+import { useForm } from 'react-hook-form';
 
 import { useConceptNavigation } from '@/app/Navigation/NavigationContext';
 import { urls } from '@/app/urls';
-import { IChangePasswordDTO } from '@/backend/auth/api';
+import { ChangePasswordSchema, IChangePasswordDTO } from '@/backend/auth/api';
 import { useChangePassword } from '@/backend/auth/useChangePassword';
 import { ErrorData } from '@/components/info/InfoError';
 import FlexColumn from '@/components/ui/FlexColumn';
 import SubmitButton from '@/components/ui/SubmitButton';
 import TextInput from '@/components/ui/TextInput';
-import { errors } from '@/utils/labels';
 
 function EditorPassword() {
   const router = useConceptNavigation();
-  const { changePassword, isPending, error, reset } = useChangePassword();
+  const { changePassword, isPending, error: serverError, reset } = useChangePassword();
+  const {
+    register,
+    handleSubmit,
+    clearErrors,
+    formState: { errors }
+  } = useForm<IChangePasswordDTO>({
+    resolver: zodResolver(ChangePasswordSchema)
+  });
 
-  const [oldPassword, setOldPassword] = useState('');
-  const [newPassword, setNewPassword] = useState('');
-  const [newPasswordRepeat, setNewPasswordRepeat] = useState('');
+  function resetErrors() {
+    reset();
+    clearErrors();
+  }
 
-  const passwordColor =
-    !!newPassword && !!newPasswordRepeat && newPassword !== newPasswordRepeat ? 'bg-warn-100' : 'clr-input';
-
-  const canSubmit = !!oldPassword && !!newPassword && !!newPasswordRepeat && newPassword === newPasswordRepeat;
-
-  function handleSubmit(event: React.FormEvent<HTMLFormElement>) {
-    event.preventDefault();
-    if (newPassword !== newPasswordRepeat) {
-      toast.error(errors.passwordsMismatch);
-      return;
-    }
-    const data: IChangePasswordDTO = {
-      old_password: oldPassword,
-      new_password: newPassword
-    };
+  function onSubmit(data: IChangePasswordDTO) {
     changePassword(data, () => router.push(urls.login));
   }
 
-  useEffect(() => {
-    reset();
-  }, [newPassword, oldPassword, newPasswordRepeat, reset]);
-
   return (
     <form
-      className={clsx('max-w-[14rem]', 'px-6 py-2 flex flex-col justify-between', 'border-l-2')}
-      onSubmit={handleSubmit}
+      className={clsx('max-w-[16rem]', 'px-6 py-2 flex flex-col justify-between', 'border-l-2')}
+      onSubmit={event => void handleSubmit(onSubmit)(event)}
+      onChange={resetErrors}
     >
       <FlexColumn>
         <TextInput
           id='old_password'
           type='password'
+          {...register('old_password')}
           label='Старый пароль'
           autoComplete='current-password'
           allowEnter
-          value={oldPassword}
-          onChange={event => setOldPassword(event.target.value)}
+          error={errors.old_password}
         />
         <TextInput
           id='new_password'
           type='password'
+          {...register('new_password')}
           label='Новый пароль'
           autoComplete='new-password'
           allowEnter
-          colors={passwordColor}
-          value={newPassword}
-          onChange={event => {
-            setNewPassword(event.target.value);
-          }}
+          error={errors.new_password}
         />
         <TextInput
-          id='new_password_repeat'
+          id='new_password2'
           type='password'
+          {...register('new_password2')}
           label='Повторите новый'
           autoComplete='new-password'
           allowEnter
-          colors={passwordColor}
-          value={newPasswordRepeat}
-          onChange={event => {
-            setNewPasswordRepeat(event.target.value);
-          }}
+          error={errors.new_password2}
         />
-        {error ? <ProcessError error={error} /> : null}
+        {serverError ? <ServerError error={serverError} /> : null}
       </FlexColumn>
-      <SubmitButton text='Сменить пароль' className='self-center' disabled={!canSubmit} loading={isPending} />
+      <SubmitButton text='Сменить пароль' className='self-center mt-2' loading={isPending} />
     </form>
   );
 }
@@ -94,7 +79,7 @@ function EditorPassword() {
 export default EditorPassword;
 
 // ====== Internals =========
-function ProcessError({ error }: { error: ErrorData }): React.ReactElement {
+function ServerError({ error }: { error: ErrorData }): React.ReactElement {
   if (axios.isAxiosError(error) && error.response && error.response.status === 400) {
     return <div className='text-sm select-text text-warn-600'>Неверно введен старый пароль</div>;
   }
diff --git a/rsconcept/frontend/src/utils/labels.ts b/rsconcept/frontend/src/utils/labels.ts
index e7676422..28aec17b 100644
--- a/rsconcept/frontend/src/utils/labels.ts
+++ b/rsconcept/frontend/src/utils/labels.ts
@@ -982,11 +982,12 @@ export const errors = {
   astFailed: 'Невозможно построить дерево разбора',
   typeStructureFailed: 'Структура отсутствует',
   passwordsMismatch: 'Пароли не совпадают',
+  passwordsSame: 'Пароль совпадает со старым',
   imageFailed: 'Ошибка при создании изображения',
   reuseOriginal: 'Повторное использование удаляемой конституенты при отождествлении',
   substituteInherited: 'Нельзя удалять наследованные конституенты при отождествлении',
   inputAlreadyExists: 'Концептуальная схема с таким именем уже существует',
-  requiredField: 'Поле обязательно для заполнения',
+  requiredField: 'Обязательное поле',
   emailField: 'Введите корректный адрес электронной почты',
   rulesNotAccepted: 'Примите условия пользования Порталом',
   privacyNotAccepted: 'Примите политику обработки персональных данных',