diff --git a/configs/properties.ts b/configs/properties.ts
index e3b2c78..8d6a963 100644
--- a/configs/properties.ts
+++ b/configs/properties.ts
@@ -12,7 +12,11 @@ export const FOOTER_LINKS = [
 ];
 
 export const MIN_USER_NAME_LENGTH = 3;
+export const MAX_USER_NAME_LENGTH = 100;
+export const MAX_USER_DESCRIPTION_LENGTH = 500;
+export const MAX_USER_ADDRESS_LENGTH = 100;
 export const MAX_USER_SOCIALS = 4;
+export const MAX_USER_SOCIAL_LENGTH = 100;
 export const MAX_USER_AVATAR_SIZE = 3 * 1024 * 1024;
 export const USER_AVATAR_FILE_TYPES = 'image/*' as const;
 
diff --git a/pages/profile/index.vue b/pages/profile/index.vue
index 00797e8..3ea0d9e 100644
--- a/pages/profile/index.vue
+++ b/pages/profile/index.vue
@@ -13,9 +13,11 @@
           <VTextField
             v-model="model.name"
             :rules="nameRules"
+            :maxlength="MAX_USER_NAME_LENGTH"
             name="name"
             label="name"
             required
+            counter
             @click:clear="clearName"
           />
         </VCol>
@@ -26,7 +28,9 @@
         >
           <VTextField
             v-model="model.description"
+            :maxlength="MAX_USER_DESCRIPTION_LENGTH"
             label="description"
+            counter
             @click:clear="clearDescription"
           />
         </VCol>
@@ -37,7 +41,9 @@
         >
           <VTextField
             v-model="model.address"
+            :maxlength="MAX_USER_ADDRESS_LENGTH"
             label="address"
+            counter
             @click:clear="clearAddress"
           />
         </VCol>
@@ -82,6 +88,8 @@
             :model-value="model.socials[idx]"
             :rules="socialRules"
             :label="`social #${social}`"
+            :maxlength="MAX_USER_SOCIAL_LENGTH"
+            counter
             @update:model-value="changeSocial(idx, $event)"
           />
         </VCol>
@@ -106,7 +114,11 @@
 import { cloneDeep, isEqual, isUndefined, omit } from 'lodash-es';
 import {
   MIN_USER_NAME_LENGTH,
+  MAX_USER_NAME_LENGTH,
+  MAX_USER_DESCRIPTION_LENGTH,
+  MAX_USER_ADDRESS_LENGTH,
   MAX_USER_SOCIALS,
+  MAX_USER_SOCIAL_LENGTH,
   USER_AVATAR_FILE_TYPES,
   MAX_USER_AVATAR_SIZE,
 } from '~/configs/properties';
diff --git a/server/api/auth/login.post.ts b/server/api/auth/login.post.ts
index 295a005..eea1143 100644
--- a/server/api/auth/login.post.ts
+++ b/server/api/auth/login.post.ts
@@ -11,10 +11,13 @@ const anotherAuthProviderMessage =
   'You tried signing in with a different authentication method than the one you used during signup. ' +
   'Please try again using your original authentication method.';
 
-const loginPayloadSchema = z.object({
-  email: emailValidator,
-  password: passwordValidator,
-});
+const loginPayloadSchema = z
+  .object({
+    email: emailValidator,
+    password: passwordValidator,
+  })
+  .strict()
+  .required();
 
 type Payload = z.infer<typeof loginPayloadSchema>;
 
@@ -34,7 +37,7 @@ export default defineEventHandler(async (event) => {
     }
 
     if (user.auth_provider !== AUTH_PROVIDERS.Email_And_Password) {
-      throw createError({ statusCode: 404, statusMessage: anotherAuthProviderMessage });
+      throw createError({ statusCode: 400, statusMessage: anotherAuthProviderMessage });
     }
 
     if (user.password !== payload.password) {
diff --git a/server/api/auth/signup.post.ts b/server/api/auth/signup.post.ts
index 6d6ff70..d112dbd 100644
--- a/server/api/auth/signup.post.ts
+++ b/server/api/auth/signup.post.ts
@@ -1,19 +1,26 @@
 import { z } from 'zod';
 
-import { AUTH_PROVIDERS, COOKIE_NAMES, MIN_USER_NAME_LENGTH, USER_IDENTITY_MAX_AGE } from '~/configs/properties';
+import {
+  AUTH_PROVIDERS,
+  COOKIE_NAMES,
+  MAX_USER_NAME_LENGTH,
+  MIN_USER_NAME_LENGTH,
+  USER_IDENTITY_MAX_AGE,
+} from '~/configs/properties';
 import Profile from '~/server/models/user/profile.model';
 import { jwtGenerator } from '~/server/services';
 import type { Profile as IProfile } from '~/types/user';
 import { stringToBase64 } from '~/utils/converters';
 import { isZodError } from '~/utils/helpers';
-import { emailValidator } from '~/utils/validators';
+import { emailValidator, passwordValidator } from '~/utils/validators';
 
 const signupPayloadSchema = z
   .object({
-    name: z.string().min(MIN_USER_NAME_LENGTH),
+    name: z.string().min(MIN_USER_NAME_LENGTH).max(MAX_USER_NAME_LENGTH),
     email: emailValidator,
-    password: z.string(),
+    password: passwordValidator,
   })
+  .strict()
   .required();
 
 type Payload = z.infer<typeof signupPayloadSchema>;
@@ -39,7 +46,7 @@ export default defineEventHandler(async (event) => {
       throw createError({ statusCode: 404, statusMessage: 'User with the provided email already exists' });
     }
 
-    const user = await Profile.create({ ...payload, provider: AUTH_PROVIDERS.Email_And_Password });
+    const user = await Profile.create({ ...payload, auth_provider: AUTH_PROVIDERS.Email_And_Password });
     Object.assign(profile, user.toObject());
   } catch (error) {
     return sendError(
diff --git a/server/models/user/profile.model.ts b/server/models/user/profile.model.ts
index a07438b..faaf6ec 100644
--- a/server/models/user/profile.model.ts
+++ b/server/models/user/profile.model.ts
@@ -1,7 +1,14 @@
 import { Schema, model } from 'mongoose';
 
-import { AUTH_PROVIDERS, MAX_USER_SOCIALS, MIN_USER_NAME_LENGTH } from '~/configs/properties';
-import { emailValidator, passwordValidator, dataURIValidator } from '~/utils/validators';
+import {
+  AUTH_PROVIDERS,
+  MAX_USER_ADDRESS_LENGTH,
+  MAX_USER_DESCRIPTION_LENGTH,
+  MAX_USER_NAME_LENGTH,
+  MAX_USER_SOCIALS,
+  MIN_USER_NAME_LENGTH,
+} from '~/configs/properties';
+import { emailValidator, passwordValidator, dataURIValidator, phoneValidator } from '~/utils/validators';
 
 const favouritesSubschema = new Schema(
   {
@@ -28,6 +35,7 @@ const schema = new Schema(
       type: String,
       required: true,
       minLength: MIN_USER_NAME_LENGTH,
+      maxLength: MAX_USER_NAME_LENGTH,
     },
     email: {
       type: String,
@@ -39,29 +47,36 @@ const schema = new Schema(
     },
     password: {
       type: String,
+      required: true,
       validate: {
         validator: (value: string) => passwordValidator.safeParse(value).success,
       },
     },
     avatar: {
       type: String,
+      default: '',
       validate: {
         validator: (value?: string) => !dataURIValidator.safeParse(value).success,
         message: 'Avatar in base64 format is forbidden.',
       },
-      default: '',
     },
     description: {
       type: String,
       default: '',
+      maxLength: MAX_USER_DESCRIPTION_LENGTH,
     },
     address: {
       type: String,
       default: '',
+      maxLength: MAX_USER_ADDRESS_LENGTH,
     },
     phone: {
       type: String,
       default: '',
+      validate: {
+        validator: (value: string) => !value || phoneValidator.safeParse(value).success,
+        message: 'Phone value is incorrect',
+      },
     },
     socials: {
       type: Array,
@@ -74,6 +89,8 @@ const schema = new Schema(
     auth_provider: {
       type: String,
       enum: Object.values(AUTH_PROVIDERS),
+      immutable: true,
+      required: true,
     },
     favourites: [favouritesSubschema],
   },
diff --git a/server/schemas.ts b/server/schemas.ts
index 90dc07d..ba32923 100644
--- a/server/schemas.ts
+++ b/server/schemas.ts
@@ -1,6 +1,14 @@
 import { z } from 'zod';
 
-import { AUTH_PROVIDERS, MAX_USER_SOCIALS, MIN_USER_NAME_LENGTH } from '~/configs/properties';
+import {
+  AUTH_PROVIDERS,
+  MAX_USER_ADDRESS_LENGTH,
+  MAX_USER_DESCRIPTION_LENGTH,
+  MAX_USER_NAME_LENGTH,
+  MAX_USER_SOCIAL_LENGTH,
+  MAX_USER_SOCIALS,
+  MIN_USER_NAME_LENGTH,
+} from '~/configs/properties';
 import { dataURIValidator, phoneValidator, urlValidator } from '~/utils/validators';
 
 export const userIdentitySchema = z
@@ -21,15 +29,15 @@ export const userFavouriteSchema = z
 
 export const userUpdateProfileSchema = z
   .object({
-    name: z.string().min(MIN_USER_NAME_LENGTH),
+    name: z.string().min(MIN_USER_NAME_LENGTH).max(MAX_USER_NAME_LENGTH),
     avatar: z
       .string()
       .refine((value) => !dataURIValidator.safeParse(value).success)
       .or(z.literal('')),
-    description: z.string(),
-    address: z.string(),
+    description: z.string().max(MAX_USER_DESCRIPTION_LENGTH),
+    address: z.string().max(MAX_USER_ADDRESS_LENGTH),
     phone: phoneValidator.or(z.literal('')),
-    socials: z.array(urlValidator.or(z.literal(''))).max(MAX_USER_SOCIALS),
+    socials: z.array(urlValidator.max(MAX_USER_SOCIAL_LENGTH).or(z.literal(''))).max(MAX_USER_SOCIALS),
     createdAt: z.string().optional(),
     updatedAt: z.string().optional(),
     favourites: z.array(userFavouriteSchema).optional(),