From c93759dcd19b43a1fb905dc83dec51d1287b24bc Mon Sep 17 00:00:00 2001
From: Synchro <marcus@synchromedia.co.uk>
Date: Tue, 25 Aug 2015 12:01:39 +0200
Subject: [PATCH] Fix issues with embedding items without filenames, fixes #478

---
 class.phpmailer.php    | 45 +++++++++++++++++++++++++++++-------------
 test/phpmailerTest.php | 25 +++++++++++++++++++++++
 2 files changed, 56 insertions(+), 14 deletions(-)

diff --git a/class.phpmailer.php b/class.phpmailer.php
index 34c2ea1d..94a50a9d 100644
--- a/class.phpmailer.php
+++ b/class.phpmailer.php
@@ -2330,12 +2330,21 @@ class PHPMailer
                 $cidUniq[$cid] = true;
 
                 $mime[] = sprintf('--%s%s', $boundary, $this->LE);
-                $mime[] = sprintf(
-                    'Content-Type: %s; name="%s"%s',
-                    $type,
-                    $this->encodeHeader($this->secureHeader($name)),
-                    $this->LE
-                );
+                //Only include a filename property if we have one
+                if (!empty($name)) {
+                    $mime[] = sprintf(
+                        'Content-Type: %s; name="%s"%s',
+                        $type,
+                        $this->encodeHeader($this->secureHeader($name)),
+                        $this->LE
+                    );
+                } else {
+                    $mime[] = sprintf(
+                        'Content-Type: %s%s',
+                        $type,
+                        $this->LE
+                    );
+                }
                 // RFC1341 part 5 says 7bit is assumed if not specified
                 if ($encoding != '7bit') {
                     $mime[] = sprintf('Content-Transfer-Encoding: %s%s', $encoding, $this->LE);
@@ -2359,12 +2368,20 @@ class PHPMailer
                             $this->LE . $this->LE
                         );
                     } else {
-                        $mime[] = sprintf(
-                            'Content-Disposition: %s; filename=%s%s',
-                            $disposition,
-                            $encoded_name,
-                            $this->LE . $this->LE
-                        );
+                        if (!empty($encoded_name)) {
+                            $mime[] = sprintf(
+                                'Content-Disposition: %s; filename=%s%s',
+                                $disposition,
+                                $encoded_name,
+                                $this->LE . $this->LE
+                            );
+                        } else {
+                            $mime[] = sprintf(
+                                'Content-Disposition: %s%s',
+                                $disposition,
+                                $this->LE . $this->LE
+                            );
+                        }
                     }
                 } else {
                     $mime[] = $this->LE;
@@ -2801,7 +2818,7 @@ class PHPMailer
         $disposition = 'inline'
     ) {
         // If a MIME type is not specified, try to work it out from the name
-        if ($type == '') {
+        if ($type == '' and !empty($name)) {
             $type = self::filenameToType($name);
         }
 
@@ -3103,7 +3120,7 @@ class PHPMailer
                         $data = rawurldecode($data);
                     }
                     $cid = md5($url) . '@phpmailer.0'; // RFC2392 S 2
-                    if ($this->addStringEmbeddedImage($data, $cid, '', 'base64', $match[1])) {
+                    if ($this->addStringEmbeddedImage($data, $cid, 'embed' . $imgindex, 'base64', $match[1])) {
                         $message = str_replace(
                             $images[0][$imgindex],
                             $images[1][$imgindex] . '="cid:' . $cid . '"',
diff --git a/test/phpmailerTest.php b/test/phpmailerTest.php
index 711e9c3e..4d9153a3 100644
--- a/test/phpmailerTest.php
+++ b/test/phpmailerTest.php
@@ -975,6 +975,31 @@ EOT;
         $this->assertTrue($this->Mail->send(), $this->Mail->ErrorInfo);
     }
 
+    /**
+     * Test embedded image without a name
+     */
+    public function testHTMLStringEmbedNoName()
+    {
+        $this->Mail->Body = 'This is the <strong>HTML</strong> part of the email.';
+        $this->Mail->Subject .= ': HTML + unnamed embedded image';
+        $this->Mail->isHTML(true);
+
+        if (!$this->Mail->addStringEmbeddedImage(
+            file_get_contents('../examples/images/phpmailer_mini.png'),
+            md5('phpmailer_mini.png').'@phpmailer.0',
+            '', //intentionally empty name
+            'base64',
+            'image/png',
+            'inline')
+        ) {
+            $this->assertTrue(false, $this->Mail->ErrorInfo);
+            return;
+        }
+
+        $this->buildBody();
+        $this->assertTrue($this->Mail->send(), $this->Mail->ErrorInfo);
+    }
+
     /**
      * Simple HTML and multiple attachment test
      */