Merge pull request #53 from cash/reflected_xss_fixes

Fixes #3544 Reflected xss fixes

2 files changed, 8 insertions, 0 deletions

diff --git a/engine/lib/input.php b/engine/lib/input.php
index 84752bc7d..56ec214dc 100644
--- a/engine/lib/input.php
+++ b/engine/lib/input.php
@@ -10,8 +10,13 @@
 /**
  * Get some input from variables passed on the GET or POST line.
  *
+ * If using any data obtained from get_input() in a web page, please be aware that
+ * it is a possible vector for a reflected XSS attack. If you are expecting an
+ * integer, cast it to an int. If it is a string, escape quotes.
+ *
  * Note: this function does not handle nested arrays (ex: form input of param[m][n])
  * because of the filtering done in htmlawed from the filter_tags call.
+ * @todo Is this ^ still?
  *
  * @param string $variable      The variable we want to return.
  * @param mixed  $default       A default value for the variable if it is not found.
diff --git a/engine/lib/river.php b/engine/lib/river.php
index 36dde7f05..1a2be1e50 100644
--- a/engine/lib/river.php
+++ b/engine/lib/river.php
@@ -589,10 +589,13 @@ function elgg_river_page_handler($page) {
 
 	elgg_set_page_owner_guid(elgg_get_logged_in_user_guid());
 
+	// make a URL segment available in page handler script
 	$page_type = elgg_extract(0, $page, 'all');
+	$page_type = preg_replace('[\W]', '', $page_type);
 	if ($page_type == 'owner') {
 		$page_type = 'mine';
 	}
+	set_input('page_type', $page_type);
 
 	// content filter code here
 	$entity_type = '';