diff --git a/NEWS b/NEWS
index 012643350..456486015 100644
--- a/NEWS
+++ b/NEWS
@@ -50,6 +50,7 @@ Bug fixes
  - [web] cards list not accessible when changing address book in expanded card view
  - [web] added missing subject to junk/not junk reports
  - [web] fixed file uploader URL in mail editor
+ - [web] fixed decoding of spaces in URL-encoded parameters (+)
  - [eas] hebrew folders encoding problem using EAS (#4240)
  - [eas] avoid sync requests for shared folders every second (#4275)
 
diff --git a/UI/SOGoUI/UIxComponent.m b/UI/SOGoUI/UIxComponent.m
index bb334d480..b04cab702 100644
--- a/UI/SOGoUI/UIxComponent.m
+++ b/UI/SOGoUI/UIxComponent.m
@@ -173,6 +173,7 @@ static SoProduct      *commonProduct      = nil;
 - (void) _parseQueryString: (NSString *) _s
 {
   NSEnumerator *e;
+  NSMutableString *urlEncodedValue;
   NSString *part;
   NSRange  r;
   NSString *key, *value;
@@ -190,8 +191,9 @@ static SoProduct      *commonProduct      = nil;
       else
         {
           key = [[part substringToIndex:r.location] stringByUnescapingURL];
-          value = [[part substringFromIndex:(r.location + r.length)] 
-                    stringByUnescapingURL];
+          urlEncodedValue = [NSMutableString stringWithString: [part substringFromIndex:(r.location + r.length)]];
+          [urlEncodedValue replaceString: @"+" withString: @" "];
+          value = [urlEncodedValue stringByUnescapingURL];
         }
       if (key && value)
         [queryParameters setObject:value forKey:key];