Fixed 'Medium' to 'Moderate' in accordance with issue severity guidelines in security.hbs.
diff --git a/src/pages/html/security.hbs b/src/pages/html/security.hbs
index 8a88253..3605bd2 100644
--- a/src/pages/html/security.hbs
+++ b/src/pages/html/security.hbs
@@ -53,7 +53,7 @@
 <div class="row">
     <div class="large-12 columns">
         <p><a id="CVE-2017-12632" href="#CVE-2017-12632"><strong>CVE-2017-12632</strong></a>: Apache NiFi host header poisoning issue</p>
-        <p>Severity: <strong>Medium</strong></p>
+        <p>Severity: <strong>Moderate</strong></p>
         <p>Versions Affected:</p>
         <ul>
             <li>Apache NiFi 0.1.0 - 1.4.0</li>
@@ -68,7 +68,7 @@
 <div class="row">
     <div class="large-12 columns">
         <p><a id="CVE-2017-15697" href="#CVE-2017-15697"><strong>CVE-2017-15697</strong></a>: Apache NiFi XSS issue in context path handling</p>
-        <p>Severity: <strong>Medium</strong></p>
+        <p>Severity: <strong>Moderate</strong></p>
         <p>Versions Affected:</p>
         <ul>
             <li>Apache NiFi 1.0.0 - 1.4.0</li>
@@ -89,7 +89,7 @@
 <div class="row">
     <div class="large-12 columns">
         <p><a id="CVE-2017-12623" href="#CVE-2017-12623"><b>CVE-2017-12623</b></a>: Apache NiFi XXE issue in template XML upload</p>
-        <p>Severity: <del><b>Medium</b></del> <strong>Important</strong></p>
+        <p>Severity: <del><b>Moderate</b></del> <strong>Important</strong></p>
         <p>Versions Affected:</p>
         <ul>
             <li>Apache NiFi 1.0.0 - 1.3.0</li>
@@ -104,7 +104,7 @@
 <div class="row">
     <div class="large-12 columns">
         <p><a id="CVE-2017-15703" href="#CVE-2017-15703"><b>CVE-2017-15703</b></a>: Apache NiFi Java deserialization issue in template XML upload</p>
-        <p>Severity: <strong>Important</strong></p>
+        <p>Severity: <strong>Moderate</strong></p>
         <p>Versions Affected:</p>
         <ul>
             <li>Apache NiFi 1.0.0 - 1.3.0</li>