Bug #74858 [NEW]: DOMDocument loadHTML parses html tags inside cdata

From: Date: Wed, 05 Jul 2017 06:45:30 +0000
Subject: Bug #74858 [NEW]: DOMDocument loadHTML parses html tags inside cdata
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-209818@lists.php.net to get a copy of this message 
From:             qdinar at gmail dot com
Operating system: windows 10
PHP version:      5.6.30
Package:          *General Issues
Bug Type:         Bug
Bug description:DOMDocument loadHTML parses html tags inside cdata

Description:
------------
cdata which was used to escape html tags inside strings inside script
tags failed to perform that task while it was feed to PHP's
DOMDocument's loadHTML , which is made with libxml.

you can see in the example that "c='456'; //]]> " - content of script
element is going to be outputted to user.

i reported this for libxml to
https://bugzilla.gnome.org/show_bug.cgi?id=784517
but it was suggested
to report to php.

i have found similar bug https://bugs.php.net/bug.php?id=71452 here but
it is for case without "cdata", so i report another bug.

Test script:
---------------
$test_content='
<script>
//<![CDATA[
a=\'123\';
b=\'</script>\';
c=\'456\';
//]]>
</script>
';
$d=new DOMDocument();
$d->loadHTML($test_content);
echo $d->saveHTML();


Expected result:
----------------
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"
"http://www.w3.org/TR/REC-html40/loose.dtd">
<html><head>
<script>
//<![CDATA[
a='123';
b='</script>';
c='456';
//]]>
</script>
</head>
<body></body>
</html>


Actual result:
--------------
PHP Warning:  DOMDocument::loadHTML(): Unexpected end tag : script in
Entity, line: 8 in C:\xampp\htdocs\test\dom_cdata.php on line 13

Warning: DOMDocument::loadHTML(): Unexpected end tag : script in Entity,
line: 8 in C:\xampp\htdocs\test\dom_cdata.php on line 13
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"
"http://www.w3.org/TR/REC-html40/loose.dtd">
<html><head><script>
//<![CDATA[
a='123';
b='</script></head><body><p>';
c='456';
//]]&gt;
</p></body></html>


-- 
Edit bug report at https://bugs.php.net/bug.php?id=74858&edit=1
-- 
Try a snapshot (PHP 5.4):   https://bugs.php.net/fix.php?id=74858&r=trysnapshot54
Try a snapshot (PHP 5.5):   https://bugs.php.net/fix.php?id=74858&r=trysnapshot55
Try a snapshot (trunk):     https://bugs.php.net/fix.php?id=74858&r=trysnapshottrunk
Fixed in SVN:               https://bugs.php.net/fix.php?id=74858&r=fixed
Fixed in release:           https://bugs.php.net/fix.php?id=74858&r=alreadyfixed
Need backtrace:             https://bugs.php.net/fix.php?id=74858&r=needtrace
Need Reproduce Script:      https://bugs.php.net/fix.php?id=74858&r=needscript
Try newer version:          https://bugs.php.net/fix.php?id=74858&r=oldversion
Not developer issue:        https://bugs.php.net/fix.php?id=74858&r=support
Expected behavior:          https://bugs.php.net/fix.php?id=74858&r=notwrong
Not enough info:            https://bugs.php.net/fix.php?id=74858&r=notenoughinfo
Submitted twice:            https://bugs.php.net/fix.php?id=74858&r=submittedtwice
register_globals:           https://bugs.php.net/fix.php?id=74858&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=74858&r=php4
Daylight Savings:           https://bugs.php.net/fix.php?id=74858&r=dst
IIS Stability:              https://bugs.php.net/fix.php?id=74858&r=isapi
Install GNU Sed:            https://bugs.php.net/fix.php?id=74858&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=74858&r=float
No Zend Extensions:         https://bugs.php.net/fix.php?id=74858&r=nozend
MySQL Configuration Error:  https://bugs.php.net/fix.php?id=74858&r=mysqlcfg

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