Index: openacs-4/packages/xowiki/tcl/syndicate-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowiki/tcl/syndicate-procs.tcl,v
diff -u -r1.51.2.6 -r1.51.2.7
--- openacs-4/packages/xowiki/tcl/syndicate-procs.tcl	4 Jul 2019 17:51:39 -0000	1.51.2.6
+++ openacs-4/packages/xowiki/tcl/syndicate-procs.tcl	3 May 2020 17:14:02 -0000	1.51.2.7
@@ -272,8 +272,12 @@
     set last_user ""
     set last_item ""
     set last_clock ""
-    if {[info exists :user_id]} { append where_clause " and o.creation_user = ${:user_id} " }
-    if {[info exists :limit]} { set limit  [:limit] }
+    if {[info exists :user_id]} {
+      append where_clause " and o.creation_user = [ns_dbquotevalue ${:user_id}] "
+    }
+    if {[info exists :limit]} {
+      set limit  [:limit]
+    }
 
     ::xo::OrderedComposite items -destroy_on_cleanup
     set sql [::xo::dc select \