Index: openacs-4/packages/xowiki/tcl/weblog-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/xowiki/tcl/weblog-procs.tcl,v
diff -u -N -r1.70.2.7 -r1.70.2.8
--- openacs-4/packages/xowiki/tcl/weblog-procs.tcl	26 Apr 2016 07:07:32 -0000	1.70.2.7
+++ openacs-4/packages/xowiki/tcl/weblog-procs.tcl	11 May 2016 07:01:01 -0000	1.70.2.8
@@ -66,7 +66,7 @@
     set extra_where_clause ""
 
     if {$date ne ""} {
-      if {[regexp {['\"<>\(\)%]} $date]} {
+      if {[regexp -nocase -- {(['\"<>\(\)%*]|null|select)} $date]} {
         ns_log Warning "ignoring invalid date '$date'"
         set date ""
         set query [::xo::update_query $query date ""]