Index: openacs-4/packages/general-comments/www/url-add-2.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/general-comments/www/url-add-2.tcl,v
diff -u -r1.8.2.2 -r1.8.2.3
--- openacs-4/packages/general-comments/www/url-add-2.tcl	21 Mar 2023 15:07:56 -0000	1.8.2.2
+++ openacs-4/packages/general-comments/www/url-add-2.tcl	23 Mar 2023 13:56:29 -0000	1.8.2.3
@@ -20,6 +20,11 @@
             ad_complain "[_ general-comments.lt_Attaching_links_to_co]"
         }
     }
+    no_data_url {
+        if {[string match "data:*" [string trim $url]]} {
+            ad_complain "\[ns_quotehtml $url]\" must not start with 'data:'"
+        }
+    }
 }
 
 # authenticate the user