diff --git a/packages/hydrojudge/package.json b/packages/hydrojudge/package.json
index 78359b6ce..62a874efa 100644
--- a/packages/hydrojudge/package.json
+++ b/packages/hydrojudge/package.json
@@ -1,7 +1,7 @@
 {
     "name": "@hydrooj/hydrojudge",
     "bin": "bin/hydrojudge.js",
-    "version": "2.11.2",
+    "version": "2.11.3",
     "main": "package.json",
     "author": "undefined <i@undefined.moe>",
     "repository": "https://github.com/hydro-dev/Hydro.git",
diff --git a/packages/hydrojudge/src/cases.ts b/packages/hydrojudge/src/cases.ts
index f015089fc..36c7ee824 100644
--- a/packages/hydrojudge/src/cases.ts
+++ b/packages/hydrojudge/src/cases.ts
@@ -229,6 +229,7 @@ export default async function readCases(folder: string, cfg: Record<string, any>
         result.subtasks = c.subtasks;
         result.count = c.count;
     }
-    if ((!args.key) || args.key !== result.key) isValidConfig(result);
+    if (args.key && args.key !== result.key) throw new FormatError('Incorrect secret key');
+    if (!args.key) isValidConfig(result);
     return result;
 }
diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index d527f6fcb..0224cb0e0 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.37.2",
+    "version": "2.37.3",
     "bin": "bin/hydrooj.js",
     "main": "src/loader",
     "module": "src/loader",
diff --git a/packages/hydrooj/src/handler/problem.ts b/packages/hydrooj/src/handler/problem.ts
index fd847aa90..1511da2b6 100644
--- a/packages/hydrooj/src/handler/problem.ts
+++ b/packages/hydrooj/src/handler/problem.ts
@@ -402,21 +402,25 @@ export class ProblemFilesHandler extends ProblemDetailHandler {
     @post('filename', Types.Name, true)
     @post('type', Types.Range(['testdata', 'additional_file']), true)
     async postUploadFile(domainId: string, filename: string, type = 'testdata') {
-        if ((this.pdoc.data?.length || 0) + (this.pdoc.additional_file?.length || 0) >= system.get('limit.problem_files_max')) {
-            throw new ForbiddenError('File limit exceeded.');
-        }
         if (!this.request.files.file) throw new ValidationError('file');
-        const size = Math.sum((this.pdoc.data || []).map((i) => i.size), (this.pdoc.additional_file || []).map((i) => i.size));
-        if (size >= system.get('limit.problem_files_max_size')) {
-            throw new ForbiddenError('File size limit exceeded.');
-        }
         if (!filename) filename = this.request.files.file.name || String.random(16);
         if (filename.includes('/') || filename.includes('..')) throw new ValidationError('filename', null, 'Bad filename');
+        if (!this.user.hasPriv(PRIV.PRIV_EDIT_SYSTEM)) {
+            if ((this.pdoc.data?.length || 0) + (this.pdoc.additional_file?.length || 0)
+                >= system.get('limit.problem_files_max')) {
+                throw new ForbiddenError('File limit exceeded.');
+            }
+            const size = Math.sum((this.pdoc.data || []).map((i) => i.size), (this.pdoc.additional_file || []).map((i) => i.size));
+            if (size >= system.get('limit.problem_files_max_size')) {
+                throw new ForbiddenError('File size limit exceeded.');
+            }
+        }
         if (!this.user.own(this.pdoc, PERM.PERM_EDIT_PROBLEM_SELF)) this.checkPerm(PERM.PERM_EDIT_PROBLEM);
         if (filename.endsWith('.zip')) {
             const zip = new AdmZip(this.request.files.file.path);
             const entries = zip.getEntries();
             for (const entry of entries) {
+                // TODO check file size
                 if (!entry.name) continue;
                 if (type === 'testdata') {
                     // eslint-disable-next-line no-await-in-loop
diff --git a/packages/hydrooj/src/interface.ts b/packages/hydrooj/src/interface.ts
index 3ce1c7263..be95b4f52 100644
--- a/packages/hydrooj/src/interface.ts
+++ b/packages/hydrooj/src/interface.ts
@@ -160,12 +160,14 @@ export interface ProblemConfigFile {
     judge_extra_files?: string[];
     detail?: boolean;
     outputs?: [string, number][];
+    redirect?: string;
     cases?: TestCaseConfig[];
     subtasks?: SubtaskConfig[];
     langs?: string[];
 }
 
 export interface ProblemConfig {
+    redirect?: [string, string];
     count: number;
     memoryMax: number;
     memoryMin: number;
diff --git a/packages/hydrooj/src/lib/testdataConfig.ts b/packages/hydrooj/src/lib/testdataConfig.ts
index 4c6baf40e..3607b5d06 100644
--- a/packages/hydrooj/src/lib/testdataConfig.ts
+++ b/packages/hydrooj/src/lib/testdataConfig.ts
@@ -36,6 +36,7 @@ export async function parseConfig(config: string | ProblemConfigFile = {}) {
         result.timeMax = result.timeMin = 1000;
     }
     if (cfg.langs) result.langs = cfg.langs;
+    if (cfg.redirect) result.redirect = cfg.redirect.split('/', 2) as any;
     if (cfg.filename && result.type === 'default') {
         result.type = 'fileio';
         result.subType = cfg.filename;
diff --git a/packages/hydrooj/src/service/server.ts b/packages/hydrooj/src/service/server.ts
index ac19b7119..1c945be6e 100644
--- a/packages/hydrooj/src/service/server.ts
+++ b/packages/hydrooj/src/service/server.ts
@@ -88,9 +88,9 @@ export interface Types {
 }
 
 export const Types: Types = {
-    Content: [(v) => v.toString(), isContent],
-    Name: [(v) => v.toString(), isName],
-    Title: [(v) => v.toString(), isTitle],
+    Content: [(v) => v.toString().trim(), isContent],
+    Name: [(v) => v.toString().trim(), isName],
+    Title: [(v) => v.toString().trim(), isTitle],
     String: [(v) => v.toString(), null],
     Int: [(v) => parseInt(v, 10), (v) => isSafeInteger(parseInt(v, 10))],
     UnsignedInt: [(v) => parseInt(v, 10), (v) => parseInt(v, 10) >= 0],
diff --git a/packages/ui-default/components/monaco/languages/yaml.ts b/packages/ui-default/components/monaco/languages/yaml.ts
index 65d2ec6bc..28bc3605a 100644
--- a/packages/ui-default/components/monaco/languages/yaml.ts
+++ b/packages/ui-default/components/monaco/languages/yaml.ts
@@ -37,6 +37,7 @@ const problemConfigSchema = {
   type: 'object',
   def: problemConfigSchemaDef,
   properties: {
+    redirect: { type: 'string', pattern: '[0-9a-z_-]+\\/[0-9]+' },
     key: { type: 'string', pattern: '[0-9a-f]{32}' },
     type: { enum: ['default', 'interactive', 'submit_answer', 'objective', 'remote_judge'] },
     subType: { type: 'string' },
diff --git a/packages/ui-default/jsconfig.json b/packages/ui-default/jsconfig.json
index b9472621d..7c306e165 100644
--- a/packages/ui-default/jsconfig.json
+++ b/packages/ui-default/jsconfig.json
@@ -5,7 +5,7 @@
   "compilerOptions": {
     "jsx": "react",
     "allowSyntheticDefaultImports": true,
-    "target": "ES6",
+    "target": "ES2020",
     "baseUrl": ".",
     "moduleResolution": "node",
     "paths": {
diff --git a/packages/ui-default/package.json b/packages/ui-default/package.json
index 15ce90a27..b2238fdfa 100644
--- a/packages/ui-default/package.json
+++ b/packages/ui-default/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.22.2",
+  "version": "4.22.3",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "hydro.js",
diff --git a/packages/ui-default/pages/home_messages.page.jsx b/packages/ui-default/pages/home_messages.page.jsx
index 8f776276d..f5a4f565b 100644
--- a/packages/ui-default/pages/home_messages.page.jsx
+++ b/packages/ui-default/pages/home_messages.page.jsx
@@ -39,16 +39,20 @@ const page = new NamedPage('home_messages', () => {
         type: 'DIALOGUES_MESSAGE_PUSH',
         payload: msg,
       });
-      new VjNotification({
+      const notification = new VjNotification({
         title: msg.udoc.uname,
         avatar: msg.udoc.avatarUrl,
         message: msg.mdoc.content,
         duration: 15000,
-        action: () => store.dispatch({
-          type: 'DIALOGUES_SWITCH_TO',
-          payload: msg.udoc._id,
-        }),
-      }).show();
+        action: () => {
+          store.dispatch({
+            type: 'DIALOGUES_SWITCH_TO',
+            payload: msg.udoc._id,
+          });
+          notification.hide();
+        },
+      });
+      notification.show();
     };
 
     const userSelector = UserSelectAutoComplete.getOrConstruct($('.dialog__body--user-select [name="user"]'));
diff --git a/packages/vjudge/package.json b/packages/vjudge/package.json
index af3fc31bf..84fdb03a5 100644
--- a/packages/vjudge/package.json
+++ b/packages/vjudge/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@hydrooj/vjudge",
-    "version": "1.3.7",
+    "version": "1.3.8",
     "description": "Submit problems to remote oj",
     "main": "package.json",
     "repository": "https://github.com/hydro-dev/Hydro.git",
diff --git a/packages/vjudge/src/interface.ts b/packages/vjudge/src/interface.ts
index 75e4fca1a..0573f62f1 100644
--- a/packages/vjudge/src/interface.ts
+++ b/packages/vjudge/src/interface.ts
@@ -19,7 +19,7 @@ declare module 'hydrooj/src/interface' {
     }
 }
 export interface IBasicProvider {
-    ensureLogin(): Promise<boolean>;
+    ensureLogin(): Promise<boolean | string>;
     getProblem(id: string): Promise<{
         title: string;
         data: Record<string, any>;
diff --git a/packages/vjudge/src/model.ts b/packages/vjudge/src/model.ts
index 29365390e..2a7bc967f 100644
--- a/packages/vjudge/src/model.ts
+++ b/packages/vjudge/src/model.ts
@@ -71,11 +71,11 @@ class Service {
 
     async login() {
         const login = await this.api.ensureLogin();
-        if (login) {
+        if (login === true) {
             logger.info(`${this.account.type}/${this.account.handle}: logged in`);
             return true;
         }
-        logger.warn(`${this.account.type}/${this.account.handle}: login fail`);
+        logger.warn(`${this.account.type}/${this.account.handle}: login fail`, login || '');
         return false;
     }