diff --git a/phpBB/styles/prosilver/template/attachment.html b/phpBB/styles/prosilver/template/attachment.html
index f48f49efb4..7472abaee6 100644
--- a/phpBB/styles/prosilver/template/attachment.html
+++ b/phpBB/styles/prosilver/template/attachment.html
@@ -66,7 +66,8 @@
 				<param name="loop" value="true" />
 				<param name="quality" value="high" />
 				<param name="allowScriptAccess" value="never" />
-				<embed src="{_file.U_DOWNLOAD_LINK}" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash" width="{_file.WIDTH}" height="{_file.HEIGHT}" play="true" loop="true" quality="high" allowscriptaccess="never"></embed>
+				<param name="allowNetworking" value="internal" />
+				<embed src="{_file.U_DOWNLOAD_LINK}" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash" width="{_file.WIDTH}" height="{_file.HEIGHT}" play="true" loop="true" quality="high" allowscriptaccess="never" allownetworking="internal"></embed>
 			</object>
 		<!-- ELSEIF _file.S_QUICKTIME_FILE -->
 			<object id="qtstream_{_file.ATTACH_ID}" classid="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B" codebase="http://www.apple.com/qtactivex/qtplugin.cab#version=6,0,2,0" width="0" height="16">
diff --git a/phpBB/styles/prosilver/template/bbcode.html b/phpBB/styles/prosilver/template/bbcode.html
index a600a7c92a..bb90c46ced 100644
--- a/phpBB/styles/prosilver/template/bbcode.html
+++ b/phpBB/styles/prosilver/template/bbcode.html
@@ -37,4 +37,4 @@
 
 <!-- BEGIN email --><a href="mailto:{EMAIL}">{DESCRIPTION}</a><!-- END email -->
 
-<!-- BEGIN flash --><object classid="clsid:D27CDB6E-AE6D-11CF-96B8-444553540000" codebase="http://active.macromedia.com/flash2/cabs/swflash.cab#version=5,0,0,0" width="{WIDTH}" height="{HEIGHT}"><param name="movie" value="{URL}" /><param name="play" value="false" /><param name="loop" value="false" /><param name="quality" value="high" /><param name="allowScriptAccess" value="never" /><param name="allowNetworking" value="none" /><embed src="{URL}" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash" width="{WIDTH}" height="{HEIGHT}" play="false" loop="false" quality="high" allowscriptaccess="never" allowNetworking="none"></embed></object><!-- END flash -->
\ No newline at end of file
+<!-- BEGIN flash --><object classid="clsid:D27CDB6E-AE6D-11CF-96B8-444553540000" codebase="http://active.macromedia.com/flash2/cabs/swflash.cab#version=5,0,0,0" width="{WIDTH}" height="{HEIGHT}"><param name="movie" value="{URL}" /><param name="play" value="false" /><param name="loop" value="false" /><param name="quality" value="high" /><param name="allowScriptAccess" value="never" /><param name="allowNetworking" value="internal" /><embed src="{URL}" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash" width="{WIDTH}" height="{HEIGHT}" play="false" loop="false" quality="high" allowscriptaccess="never" allownetworking="internal"></embed></object><!-- END flash -->
\ No newline at end of file
diff --git a/phpBB/styles/subsilver2/template/attachment.html b/phpBB/styles/subsilver2/template/attachment.html
index c3352be251..d54994fe67 100644
--- a/phpBB/styles/subsilver2/template/attachment.html
+++ b/phpBB/styles/subsilver2/template/attachment.html
@@ -63,7 +63,8 @@
 				<param name="loop" value="true" />
 				<param name="quality" value="high" />
 				<param name="allowScriptAccess" value="never" />
-				<embed src="{_file.U_DOWNLOAD_LINK}" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash" width="{_file.WIDTH}" height="{_file.HEIGHT}" play="true" loop="true" quality="high" allowscriptaccess="never"></embed>
+				<param name="allowNetworking" value="internal" />
+				<embed src="{_file.U_DOWNLOAD_LINK}" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash" width="{_file.WIDTH}" height="{_file.HEIGHT}" play="true" loop="true" quality="high" allowscriptaccess="never" allownetworking="internal"></embed>
 			</object>
 		<!-- ELSEIF _file.S_QUICKTIME_FILE -->
 			<object id="qtstream_{_file.ATTACH_ID}" classid="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B" codebase="http://www.apple.com/qtactivex/qtplugin.cab#version=6,0,2,0" width="0" height="16">
diff --git a/phpBB/styles/subsilver2/template/bbcode.html b/phpBB/styles/subsilver2/template/bbcode.html
index 19059c5b60..50162740d0 100644
--- a/phpBB/styles/subsilver2/template/bbcode.html
+++ b/phpBB/styles/subsilver2/template/bbcode.html
@@ -63,7 +63,7 @@
 		<param name="loop" value="false" />
 		<param name="quality" value="high" />
 		<param name="allowScriptAccess" value="never" />
-		<param name="allowNetworking" value="none" />
-		<embed src="{URL}" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash" width="{WIDTH}" height="{HEIGHT}" play="false" loop="false" quality="high" allowscriptaccess="never" allowNetworking="none" ></embed>
+		<param name="allowNetworking" value="internal" />
+		<embed src="{URL}" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash" width="{WIDTH}" height="{HEIGHT}" play="false" loop="false" quality="high" allowscriptaccess="never" allownetworking="internal"></embed>
 	</object>
 <!-- END flash -->