Vulnerability CVE-2015-5956
Published: 2015-09-16

Description:
The sanitizeLocalUrl function in TYPO3 6.x before 6.2.15, 7.x before 7.4.0, 4.5.40, and earlier allows remote authenticated users to bypass the XSS filter and conduct cross-site scripting (XSS) attacks via a base64 encoded data URI, as demonstrated by the (1) returnUrl parameter to show_rechis.php and the (2) redirect_url parameter to index.php.

See advisories in our WLB2 database:
Topic
Author
Date
Low
Typo3 CMS 6.2.14 / 4.5.40 Cross Site Scripting
secunet
15.09.2015

Type:

CWE-79

 (Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'))

CVSS2 => (AV:N/AC:M/Au:S/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
3.5/10
2.9/10
6.8/10
Exploit range
Attack complexity
Authentication
Remote
Medium
Single time
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
Typo3 -> Typo3 

 References:
http://packetstormsecurity.com/files/133551/Typo3-CMS-6.2.14-4.5.40-Cross-Site-Scripting.html
http://seclists.org/fulldisclosure/2015/Sep/57
http://www.securityfocus.com/archive/1/536464/100/0/threaded
http://www.securitytracker.com/id/1033551
https://typo3.org/teams/security/security-bulletins/typo3-core/typo3-core-sa-2015-009/
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