diff --git a/src/Controller/Backoffice/PrepareEliminationController.php b/src/Controller/Backoffice/PrepareEliminationController.php
index 7b5284a..eda337b 100644
--- a/src/Controller/Backoffice/PrepareEliminationController.php
+++ b/src/Controller/Backoffice/PrepareEliminationController.php
@@ -40,6 +40,10 @@ final class PrepareEliminationController extends AbstractController
     public function viewElimination(Elimination $elimination, Request $request): Response
     {
         if ('POST' === $request->getMethod()) {
+            if (!$this->isCsrfTokenValid('prepare_elimination', $request->request->get('_token'))) {
+                throw $this->createAccessDeniedException();
+            }
+
             $elimination->updateFromInputBag($request->request);
             $this->em->flush();
 
diff --git a/src/Controller/Backoffice/QuizController.php b/src/Controller/Backoffice/QuizController.php
index 2094411..293e836 100644
--- a/src/Controller/Backoffice/QuizController.php
+++ b/src/Controller/Backoffice/QuizController.php
@@ -193,6 +193,10 @@ class QuizController extends AbstractController
     )]
     public function saveCandidateAnswers(Season $season, Quiz $quiz, Question $question, Request $request): RedirectResponse
     {
+        if (!$this->isCsrfTokenValid('candidate_answer', $request->request->get('_token'))) {
+            throw $this->createAccessDeniedException();
+        }
+
         if (false === $season->quizzes->contains($quiz)
             || false === $quiz->questions->contains($question)) {
             throw new BadRequestHttpException('Invalid quiz or question');
@@ -304,6 +308,10 @@ class QuizController extends AbstractController
             throw new MethodNotAllowedHttpException(['POST']);
         }
 
+        if (!$this->isCsrfTokenValid('candidate_correction', $request->request->get('_token'))) {
+            throw $this->createAccessDeniedException();
+        }
+
         $corrections = (float) $request->request->get('corrections');
 
         $this->quizCandidateRepository->setCorrectionsForCandidate($quiz, $candidate, $corrections);
@@ -323,6 +331,10 @@ class QuizController extends AbstractController
             throw new MethodNotAllowedHttpException(['POST']);
         }
 
+        if (!$this->isCsrfTokenValid('candidate_penalty', $request->request->get('_token'))) {
+            throw $this->createAccessDeniedException();
+        }
+
         $penalty = (int) $request->request->get('penalty');
 
         $this->quizCandidateRepository->setPenaltyForCandidate($quiz, $candidate, $penalty);
diff --git a/src/Controller/QuizController.php b/src/Controller/QuizController.php
index 9951e9d..26f53d5 100644
--- a/src/Controller/QuizController.php
+++ b/src/Controller/QuizController.php
@@ -97,6 +97,10 @@ final class QuizController extends AbstractController
         }
 
         if ('POST' === $request->getMethod()) {
+            if (!$this->isCsrfTokenValid('question', $request->request->get('token'))) {
+                throw $this->createAccessDeniedException();
+            }
+
             // TODO: Extract saving answer logic to a service
             // Check if candidate is inactive for this quiz
             $quizCandidate = $this->quizCandidateRepository->findOneBy(['quiz' => $quiz, 'candidate' => $candidate]);
diff --git a/templates/backoffice/prepare_elimination/index.html.twig b/templates/backoffice/prepare_elimination/index.html.twig
index 1c50933..bf16ede 100644
--- a/templates/backoffice/prepare_elimination/index.html.twig
+++ b/templates/backoffice/prepare_elimination/index.html.twig
@@ -15,6 +15,7 @@
     <div class="row">
         <div class="col-12 col-md-6">
             <form method="post">
+                <input type="hidden" name="_token" value="{{ csrf_token('prepare_elimination') }}">
                 {%~ for candidate, colour in elimination.data %}
                     <div class="row mb-3">
                         <label for="colour-{{ candidate|lower }}" class="col-4 col-form-label">{{ candidate }}</label>
diff --git a/templates/backoffice/quiz/tab_result.html.twig b/templates/backoffice/quiz/tab_result.html.twig
index 5aa5db5..d450c76 100644
--- a/templates/backoffice/quiz/tab_result.html.twig
+++ b/templates/backoffice/quiz/tab_result.html.twig
@@ -37,6 +37,7 @@
             <td>
                 <form method="post"
                       action="{{ path('tvdt_backoffice_modify_correction', {quiz: quiz.id, candidate: candidate.id}) }}">
+                    <input type="hidden" name="_token" value="{{ csrf_token('candidate_correction') }}">
                     <div class="row">
                         <div class="col-8">
                             <input class="form-control form-control-sm" type="number"
@@ -52,7 +53,7 @@
             <td>
                 <form method="post"
                       action="{{ path('tvdt_backoffice_modify_penalty', {quiz: quiz.id, candidate: candidate.id}) }}">
-                    <input type="hidden" name="_token" value="{{ csrf_token('candidate_answer') }}">
+                    <input type="hidden" name="_token" value="{{ csrf_token('candidate_penalty') }}">
                     <div class="row">
                         <div class="col-8">
                             <input class="form-control form-control-sm" type="number"
@@ -70,7 +71,7 @@
         </tr>
     {% else %}
         <tr>
-            <td colspan="5">{{ 'No results'|trans }}</td>
+            <td colspan="6">{{ 'No results'|trans }}</td>
         </tr>
     {% endfor %}
     </tbody>