diff --git a/lib/mustache/readme_moodle.txt b/lib/mustache/readme_moodle.txt
index 1c187bd371d..62b6c18005b 100644
--- a/lib/mustache/readme_moodle.txt
+++ b/lib/mustache/readme_moodle.txt
@@ -19,4 +19,10 @@ been already applied upstream for the release being used, can be removed
 from the list. If still not available upstream, they will need to be re-applied.
 
 1) If the relevant pull request has not been accepted yet, apply the following commit, so we are able to disable unnecessary rendering:
-    https://github.com/bobthecow/mustache.php/pull/402/commits/db771014c7e346438f68077813ebdda3fdae12df#
+https://github.com/bobthecow/mustache.php/pull/402/commits/db771014c7e346438f68077813ebdda3fdae12df#
+This can be achieved by:
+    a) Download the patch from
+    https://github.com/bobthecow/mustache.php/pull/402/commits/db771014c7e346438f68077813ebdda3fdae12df.patch
+    b) In terminal, navigate to lib/mustache/src/Mustache
+    c) Run the following: patch --directory . < ~/path/to/patch.patch
+    d) We do not need the unit test, so run rm DisableLambdaRenderingTest.php
\ No newline at end of file
diff --git a/lib/mustache/src/Mustache/Engine.php b/lib/mustache/src/Mustache/Engine.php
index 8e8bc1010e5..0d3b7218552 100644
--- a/lib/mustache/src/Mustache/Engine.php
+++ b/lib/mustache/src/Mustache/Engine.php
@@ -23,7 +23,7 @@
  */
 class Mustache_Engine
 {
-    const VERSION        = '2.14.1';
+    const VERSION        = '2.14.2';
     const SPEC_VERSION   = '1.2.2';
 
     const PRAGMA_FILTERS      = 'FILTERS';
diff --git a/lib/mustache/src/Mustache/Tokenizer.php b/lib/mustache/src/Mustache/Tokenizer.php
index 2a172c34864..e59d30bd029 100644
--- a/lib/mustache/src/Mustache/Tokenizer.php
+++ b/lib/mustache/src/Mustache/Tokenizer.php
@@ -215,6 +215,10 @@ class Mustache_Tokenizer
             }
         }
 
+        if ($this->state !== self::IN_TEXT) {
+            $this->throwUnclosedTagException();
+        }
+
         $this->flushBuffer();
 
         // Restore the user's encoding...
@@ -279,6 +283,10 @@ class Mustache_Tokenizer
         $close      = '=' . $this->ctag;
         $closeIndex = strpos($text, $close, $index);
 
+        if ($closeIndex === false) {
+            $this->throwUnclosedTagException();
+        }
+
         $token = array(
             self::TYPE => self::T_DELIM_CHANGE,
             self::LINE => $this->line,
@@ -333,6 +341,10 @@ class Mustache_Tokenizer
     private function addPragma($text, $index)
     {
         $end    = strpos($text, $this->ctag, $index);
+        if ($end === false) {
+            $this->throwUnclosedTagException();
+        }
+
         $pragma = trim(substr($text, $index + 2, $end - $index - 2));
 
         // Pragmas are hoisted to the front of the template.
@@ -344,4 +356,23 @@ class Mustache_Tokenizer
 
         return $end + $this->ctagLen - 1;
     }
+
+    private function throwUnclosedTagException()
+    {
+        $name = trim($this->buffer);
+        if ($name !== '') {
+            $msg = sprintf('Unclosed tag: %s on line %d', $name, $this->line);
+        } else {
+            $msg = sprintf('Unclosed tag on line %d', $this->line);
+        }
+
+        throw new Mustache_Exception_SyntaxException($msg, array(
+            self::TYPE  => $this->tagType,
+            self::NAME  => $name,
+            self::OTAG  => $this->otag,
+            self::CTAG  => $this->ctag,
+            self::LINE  => $this->line,
+            self::INDEX => $this->seenTag - $this->otagLen,
+        ));
+    }
 }
diff --git a/lib/thirdpartylibs.xml b/lib/thirdpartylibs.xml
index bc3cf50b84d..2f87c6aa2ef 100644
--- a/lib/thirdpartylibs.xml
+++ b/lib/thirdpartylibs.xml
@@ -308,7 +308,7 @@ All rights reserved.</copyright>
     <location>mustache</location>
     <name>Mustache</name>
     <description>PHP library for displaying mustache templates.</description>
-    <version>2.14.1</version>
+    <version>2.14.2</version>
     <license>MIT</license>
     <repository>https://github.com/bobthecow/mustache.php</repository>
     <copyrights>