diff --git a/FAQ.md b/FAQ.md
index a24dfde324..ec2c0521c3 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -404,6 +404,9 @@ Encryption/decryption is a pro feature.
 
 Please see the [known problems](#known-problems) about YubiKey.
 
+Please see [this comment](https://forum.xda-developers.com/showpost.php?p=79444379&postcount=5609)
+about [these vulnerabilities](https://amp.thehackernews.com/thn/2019/04/email-signature-spoofing.html).
+
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 <a name="faq13"></a>