diff --git a/mod/quiz/attemptlib.php b/mod/quiz/attemptlib.php
index 9039f2578b6..7817e981574 100644
--- a/mod/quiz/attemptlib.php
+++ b/mod/quiz/attemptlib.php
@@ -592,6 +592,29 @@ class quiz_attempt extends quiz {
                 (!$this->is_preview_user() || $this->attempt->preview);
     }
 
+    /**
+     * Is the current user allowed to review this attempt. This applies when
+     * {@link is_own_attempt()} returns false.
+     * @return bool whether the review should be allowed.
+     */
+    public function is_review_allowed() {
+        if (!$this->has_capability('mod/quiz:viewreports')) {
+            return false;
+        }
+
+        $cm = $this->get_cm();
+        if ($this->has_capability('moodle/site:accessallgroups') ||
+                groups_get_activity_groupmode($cm) != SEPARATEGROUPS) {
+            return true;
+        }
+
+        // Check the users have at least one group in common.
+        $teachersgroups = groups_get_activity_allowed_groups($cm);
+        $studentsgroups = groups_get_all_groups($cm->course, $this->attempt->userid, $cm->groupingid);
+        return $teachersgroups && $studentsgroups &&
+                array_intersect(array_keys($teachersgroups), array_keys($studentsgroups));
+    }
+
     /**
      * Check the appropriate capability to see whether this user may review their own attempt.
      * If not, prints an error.
diff --git a/mod/quiz/lang/en/quiz.php b/mod/quiz/lang/en/quiz.php
index dcb90e798eb..353cc162f86 100644
--- a/mod/quiz/lang/en/quiz.php
+++ b/mod/quiz/lang/en/quiz.php
@@ -531,6 +531,7 @@ $string['noquestionsnotinuse'] = 'This random question is not in use, since its
 $string['noquestionsonpage'] = 'Empty page';
 $string['noresponse'] = 'No response';
 $string['noreview'] = 'You are not allowed to review this quiz';
+$string['noreviewattempt'] = 'You are not allowed to review this attempt.';
 $string['noreviewshort'] = 'Not permitted';
 $string['noreviewuntil'] = 'You are not allowed to review this quiz until {$a}';
 $string['noreviewuntilshort'] = 'Available {$a}';
diff --git a/mod/quiz/review.php b/mod/quiz/review.php
index e3714d02ec5..240de7bdfc5 100644
--- a/mod/quiz/review.php
+++ b/mod/quiz/review.php
@@ -34,21 +34,17 @@
     $accessmanager = $attemptobj->get_access_manager(time());
     $options = $attemptobj->get_review_options();
 
-/// Permissions checks for normal users who do not have quiz:viewreports capability.
-    if (!$attemptobj->has_capability('mod/quiz:viewreports')) {
-    /// Can't review other users' attempts.
-        if (!$attemptobj->is_own_attempt()) {
-            quiz_error($attemptobj->get_quiz(), 'notyourattempt');
-        }
-    /// Can't review during the attempt - send them back to the attempt page.
+    // Check permissions.
+    if ($attemptobj->is_own_attempt()) {
         if (!$attemptobj->is_finished()) {
             redirect($attemptobj->attempt_url(0, $page));
-        }
-    /// Can't review unless Students may review -> Responses option is turned on.
-        if (!$options->responses) {
+        } else if (!$options->responses) {
             $accessmanager->back_to_view_page($attemptobj->is_preview_user(),
-                    $accessmanager->cannot_review_message($options));
+                    $accessmanager->cannot_review_message($attemptobj->get_attempt_state()));
         }
+
+    } else if (!$attemptobj->is_review_allowed()) {
+        throw new moodle_quiz_exception($attemptobj, 'noreviewattempt');
     }
 
 /// Load the questions and states needed by this page.
diff --git a/mod/quiz/reviewquestion.php b/mod/quiz/reviewquestion.php
index 48d87edecb5..a61851e4b3b 100644
--- a/mod/quiz/reviewquestion.php
+++ b/mod/quiz/reviewquestion.php
@@ -32,27 +32,15 @@
     $accessmanager = $attemptobj->get_access_manager(time());
     $options = $attemptobj->get_review_options();
 
-/// Permissions checks for normal users who do not have quiz:viewreports capability.
-    if (!$attemptobj->has_capability('mod/quiz:viewreports')) {
-    /// Can't review during the attempt - send them back to the attempt page.
+    // Check permissions.
+    if ($attemptobj->is_own_attempt()) {
         if (!$attemptobj->is_finished()) {
             echo $OUTPUT->header();
             echo $OUTPUT->notification(get_string('cannotreviewopen', 'quiz'));
             echo $OUTPUT->close_window_button();
             echo $OUTPUT->footer();
             die;
-        }
-    /// Can't review other users' attempts.
-        if (!$attemptobj->is_own_attempt()) {
-            echo $OUTPUT->header();
-            echo $OUTPUT->notification(get_string('notyourattempt', 'quiz'));
-            echo $OUTPUT->close_window_button();
-            echo $OUTPUT->footer();
-            die;
-        }
-
-    /// Can't review unless Students may review -> Responses option is turned on.
-        if (!$options->responses) {
+        } else if (!$options->responses) {
             $accessmanager = $attemptobj->get_access_manager(time());
             echo $OUTPUT->header();
             echo $OUTPUT->notification($accessmanager->cannot_review_message($attemptobj->get_review_options()));
@@ -60,6 +48,9 @@
             echo $OUTPUT->footer();
             die;
         }
+
+    } else if (!$attemptobj->is_review_allowed()) {
+        throw new moodle_quiz_exception($attemptobj, 'noreviewattempt');
     }
 
 /// Load the questions and states.