diff --git a/changelog.md b/changelog.md
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--- a/changelog.md
+++ b/changelog.md
@@ -1,4 +1,7 @@
 ## Version 1.13.13+dev
+ ### Security fixes
+   * Fixed an issue allowing MP lobby and whisper message origins to be spoofed
+     by clients.
  ### Campaigns
    * The Hammer of Thursagan
      * S12 Fixed enemies from ai6 (south-east lich) going to the book (spider)