Prevent overlapping tags

2017-03-31 15:18:35 -03:00
parent 7d1cae8ae8
commit 8dfa0220c3
2 changed files with 23 additions and 2 deletions
--- a/src/Discord.Net.Core/Utils/MentionUtils.cs
+++ b/src/Discord.Net.Core/Utils/MentionUtils.cs
@@ -256,6 +256,15 @@ namespace Discord
            if (mode != TagHandling.Remove)
            {
                Emoji emoji = (Emoji)tag.Value;
+
+                //Remove if its name contains any bad chars (prevents a few tag exploits)
+                for (int i = 0; i < emoji.Name.Length; i++)
+                {
+                    char c = emoji.Name[i];
+                    if (!char.IsLetterOrDigit(c) && c != '_' && c != '-')
+                        return "";
+                }
+
                switch (mode)
                {
                    case TagHandling.Name: