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SPIP 3.1.2 Cross Site Scripting Vulnerability
Author
Risk
[Security Risk Medium
]0day-ID
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Date add
CVE
Platform
## SPIP 3.1.2 Reflected Cross-Site Scripting (CVE-2016-7981)
### Product Description
SPIP is a publishing system for the Internet, which put importance on collaborative working, multilingual environments and ease of use. It is free software, distributed under the GNU/GPL licence.
### Vulnerability Description
The `var_url` parameter of the `valider_xml` file is not correctly sanitized and can be used to trigger a reflected XSS vulnerability.
**Access Vector**: remote
**Security Risk**: medium
**Vulnerability**: CWE-79
**CVSS Base Score**: 6.8 (Medium)
**CVE-ID**: CVE-2016-7981
### Proof of Concept
http://spip-dev.srv/ecrire/?exec=valider_xml&var_url=%22%3E%3Ch1%3EXSS!%3C/h1%3E
### Vulnerable code
The `$url variable` is not properly sanitized in `valider_xml.php`, line 134 :
$res =
"<div style='text-align: center'>" . $err . "</div>" .
"<div style='margin: 10px; text-align: left'>" . $texte . '</div>';
$bandeau = "<a href='$url_aff'>$url</a>";
The Cross-Site Scripting vulnerability is triggered on line 146 :
echo "<h1>", $titre, '<br>', $bandeau, '</h1>',
### Timeline (dd/mm/yyyy)
* 15/09/2016 : Initial discovery
* 26/09/2016 : Contact with SPIP Team
* 27/09/2016 : Answer from SPIP Team, sent advisory details
* 27/09/2016 : Incorrect fix from SPIP Team.
* 27/09/2016 : New proof of concept for bypassing fixes for XSS sent.
* 27/09/2016 : Fixes issued for XSS (23185).
* 30/09/2016 : SPIP 3.1.3 Released
### Fixes
* https://core.spip.net/projects/spip/repository/revisions/23200
* https://core.spip.net/projects/spip/repository/revisions/23201
* https://core.spip.net/projects/spip/repository/revisions/23202
### Affected versions
* Version <= 3.1.2
### Credits
* Nicolas CHATELAIN, Sysdream (n.chatelain -at- sysdream -dot- com)
# 0day.today [2024-07-05] #