diff --git a/frontend/locales/en.json b/frontend/locales/en.json
index e8315677c..d6217b915 100644
--- a/frontend/locales/en.json
+++ b/frontend/locales/en.json
@@ -561,7 +561,8 @@
         "message": "Your account has been registered successfully. You can now log in with your username and password."
       },
       "error": {
-        "registrationDisabled": "The registration is disabled",
+        "passwordTooWeak": "The password is too weak.",
+        "registrationDisabled": "The registration is disabled.",
         "usernameExisting": "There is already an account with this username.",
         "other": "There was an error while registering your account. Just try it again."
       }
diff --git a/frontend/src/api/auth/local.ts b/frontend/src/api/auth/local.ts
index ce2a58abd..c2af57f58 100644
--- a/frontend/src/api/auth/local.ts
+++ b/frontend/src/api/auth/local.ts
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
+ * SPDX-FileCopyrightText: 2023 The HedgeDoc developers (see AUTHORS file)
  *
  * SPDX-License-Identifier: AGPL-3.0-only
  */
@@ -36,6 +36,7 @@ export const doLocalLogin = async (username: string, password: string): Promise<
  * @param username The username of the new user.
  * @param displayName The display name of the new user.
  * @param password The password of the new user.
+ * @throws {RegisterError.PASSWORD_TOO_WEAK} when the backend deems the password too weak.
  * @throws {RegisterError.USERNAME_EXISTING} when there is already an existing user with the same username.
  * @throws {RegisterError.REGISTRATION_DISABLED} when the registration of local users has been disabled on the backend.
  * @throws {Error} when the api request wasn't successful.
@@ -48,7 +49,8 @@ export const doLocalRegister = async (username: string, displayName: string, pas
       password
     })
     .withStatusCodeErrorMapping({
-      400: RegisterError.REGISTRATION_DISABLED,
+      400: RegisterError.PASSWORD_TOO_WEAK,
+      403: RegisterError.REGISTRATION_DISABLED,
       409: RegisterError.USERNAME_EXISTING
     })
     .sendRequest()
diff --git a/frontend/src/api/auth/types.ts b/frontend/src/api/auth/types.ts
index b34629a34..b7c549ccc 100644
--- a/frontend/src/api/auth/types.ts
+++ b/frontend/src/api/auth/types.ts
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
+ * SPDX-FileCopyrightText: 2023 The HedgeDoc developers (see AUTHORS file)
  *
  * SPDX-License-Identifier: AGPL-3.0-only
  */
@@ -12,6 +12,7 @@ export enum AuthError {
 
 export enum RegisterError {
   USERNAME_EXISTING = 'usernameExisting',
+  PASSWORD_TOO_WEAK = 'passwordTooWeak',
   REGISTRATION_DISABLED = 'registrationDisabled',
   OTHER = 'other'
 }
diff --git a/frontend/src/components/register-page/register-error/register-error.tsx b/frontend/src/components/register-page/register-error/register-error.tsx
index ae5bf3de6..2064b1369 100644
--- a/frontend/src/components/register-page/register-error/register-error.tsx
+++ b/frontend/src/components/register-page/register-error/register-error.tsx
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
+ * SPDX-FileCopyrightText: 2023 The HedgeDoc developers (see AUTHORS file)
  *
  * SPDX-License-Identifier: AGPL-3.0-only
  */
@@ -22,6 +22,8 @@ export const RegisterError: React.FC<RegisterErrorProps> = ({ error }) => {
 
   const errorMessageI18nKey = useMemo(() => {
     switch (error) {
+      case RegisterErrorType.PASSWORD_TOO_WEAK:
+        return 'login.register.error.passwordTooWeak'
       case RegisterErrorType.REGISTRATION_DISABLED:
         return 'login.register.error.registrationDisabled'
       case RegisterErrorType.USERNAME_EXISTING: