diff --git a/packages/hydrojudge/src/testlib.ts b/packages/hydrojudge/src/testlib.ts
index 07a90bed..16ecf89e 100644
--- a/packages/hydrojudge/src/testlib.ts
+++ b/packages/hydrojudge/src/testlib.ts
@@ -29,8 +29,7 @@ export function parse(output: string, fullscore: number) {
         if (p === 1) {
             status = STATUS.STATUS_ACCEPTED;
             score = fullscore;
-            const base = output.replace('points ', '') || '';
-            message = base.substring(base.indexOf(' '), 1024);
+            message = output.replace(/^points [\d.]+ /, '') || '';
         } else score = Math.floor(fullscore * p);
     }
     while (operation.test(message)) {
diff --git a/packages/hydrooj/src/handler/contest.ts b/packages/hydrooj/src/handler/contest.ts
index fcd42bb2..43b1aa04 100644
--- a/packages/hydrooj/src/handler/contest.ts
+++ b/packages/hydrooj/src/handler/contest.ts
@@ -245,6 +245,7 @@ export class ContestDetailHandler extends Handler {
     @param('tid', Types.ObjectId)
     @param('code', Types.String, true)
     async postAttend(domainId: string, tid: ObjectId, code = '') {
+        this.checkPerm(PERM.PERM_ATTEND_CONTEST);
         if (contest.isDone(this.tdoc)) throw new ContestNotLiveError(tid);
         if (this.tdoc._code && code !== this.tdoc._code) throw new InvalidTokenError('Contest Invitation', code);
         await contest.attend(domainId, tid, this.user._id);
diff --git a/packages/ui-default/api.ts b/packages/ui-default/api.ts
index 225c7861..f07b133c 100644
--- a/packages/ui-default/api.ts
+++ b/packages/ui-default/api.ts
@@ -10,6 +10,7 @@ export { default as Socket } from './components/socket/index';
 export { default as uploadFiles } from './components/upload';
 export * as redux from 'react-redux';
 export * from './components/zipDownloader';
+export * from '@hydrooj/utils/lib/common';
 export { default as download } from './components/zipDownloader';
 export { default as $ } from 'jquery';
 export { default as _ } from 'lodash';
diff --git a/packages/ui-default/backendlib/template.js b/packages/ui-default/backendlib/template.js
index 38f870c6..0bd368fc 100644
--- a/packages/ui-default/backendlib/template.js
+++ b/packages/ui-default/backendlib/template.js
@@ -137,6 +137,7 @@ env.addGlobal('eval', eval);
 env.addGlobal('Date', Date);
 env.addGlobal('Object', Object);
 env.addGlobal('String', String);
+env.addGlobal('Array', Array);
 env.addGlobal('Math', Math);
 env.addGlobal('process', process);
 env.addGlobal('global', global);