MDL-69911 core: Clean content passed through TeX filter

2021-01-08 05:18:21 +01:00
parent 680cb4c2bc
commit f0bb4a442a
1 changed files with 3 additions and 0 deletions
@@ -189,6 +189,9 @@ class filter_tex extends moodle_text_filter {
                continue;
            }

+            // Sanitize the decoded string, because filter_text_image() injects the final string between script tags.
+            $texexp = clean_param($texexp, PARAM_TEXT);
+
            $md5 = md5($texexp);
            if (!$DB->record_exists("cache_filters", array("filter"=>"tex", "md5key"=>$md5))) {
                $texcache = new stdClass();