diff --git a/NEWS b/NEWS
index 32adff4cb..4ed4d04d6 100644
--- a/NEWS
+++ b/NEWS
@@ -39,6 +39,7 @@ Bug fixes
  - [web] restore messages selection after automatic refresh (#4330)
  - [web] fixed path of destination mailbox in Sieve filter editor
  - [web] force copy of dragged contacts from global address books
+ - [web] removed null characters from JSON responses
  - [eas] hebrew folders encoding problem using EAS (#4240)
  - [eas] avoid sync requests for shared folders every second (#4275)
 
diff --git a/SoObjects/SOGo/NSString+Utilities.m b/SoObjects/SOGo/NSString+Utilities.m
index 35da33b9c..ca39ec9ca 100644
--- a/SoObjects/SOGo/NSString+Utilities.m
+++ b/SoObjects/SOGo/NSString+Utilities.m
@@ -264,6 +264,7 @@ static int cssEscapingCount;
   [representation replaceString: @"\n" withString: @"\\n"];
   [representation replaceString: @"\r" withString: @"\\r"];
   [representation replaceString: @"\t" withString: @"\\t"];
+  [representation replaceString: @"\0" withString: @""];
 
   return representation;
 }