--- a/browser/app/blocklist.xml
+++ b/browser/app/blocklist.xml
@@ -2754,16 +2754,21 @@
     </pluginItem>
     <pluginItem blockID="p574">
       <match exp="NPDjVu\.plugin" name="filename"/>
       <versionRange maxVersion="6.1.1" minVersion="0" severity="0" vulnerabilitystatus="1"/>
     </pluginItem>
     <pluginItem blockID="p28">
       <match exp="NPFFAddOn.dll" name="filename"/>
     </pluginItem>
+    <pluginItem blockID="p1421" os="Linux">
+      <match exp="libflashplayer\.so" name="filename"/>
+      <infoURL>https://get.adobe.com/flashplayer/</infoURL>
+      <versionRange maxVersion="23.0.0.207" minVersion="11.2.202.643" severity="0" vulnerabilitystatus="1"/>
+    </pluginItem>
     <pluginItem blockID="p302">
       <match exp="Java\(TM\) Plug-in 1\.6\.0_(39|40|41)([^\d\._]|$)" name="name"/>
       <match exp="libnpjp2\.so" name="filename"/>
       <versionRange severity="0" vulnerabilitystatus="1">
         <targetApplication id="{ec8030f7-c20a-464f-9b0e-13a3a9e97384}">
           <versionRange maxVersion="*" minVersion="17.0"/>
         </targetApplication>
       </versionRange>
@@ -2946,16 +2951,21 @@
       <match exp="npuplaypc\.dll" name="filename"/>
       <versionRange maxVersion="1.0.0.0" minVersion="0" severity="1"/>
     </pluginItem>
     <pluginItem blockID="p1247">
       <match exp="(nppdf32\.dll)|(AdobePDFViewerNPAPI\.plugin)" name="filename"/>
       <infoURL>https://get.adobe.com/reader</infoURL>
       <versionRange maxVersion="15.006.30174" minVersion="15.006.30174" severity="0" vulnerabilitystatus="1"/>
     </pluginItem>
+    <pluginItem blockID="p1422">
+      <match exp="(NPSWF32.*\.dll)|(NPSWF64.*\.dll)|(Flash\ Player\.plugin)" name="filename"/>
+      <infoURL>https://get.adobe.com/flashplayer/</infoURL>
+      <versionRange maxVersion="23.0.0.207" minVersion="23.0.0.205" severity="0" vulnerabilitystatus="1"/>
+    </pluginItem>
     <pluginItem blockID="p418">
       <match exp="Java\(TM\) Plug-in 1\.7\.0_(1[6-9]|2[0-4])([^\d\._]|$)" name="name"/>
       <match exp="libnpjp2\.so" name="filename"/>
       <versionRange severity="0" vulnerabilitystatus="1">
         <targetApplication id="{ec8030f7-c20a-464f-9b0e-13a3a9e97384}">
           <versionRange maxVersion="*" minVersion="17.0"/>
         </targetApplication>
       </versionRange>