www.eVuln.com advisory:
HTTP Response Splitting in WWWThreads (php version)
Summary: http://evuln.com/vulns/156/summary.html 
Details: http://evuln.com/vulns/156/description.html 

-----------Summary-----------
eVuln ID: EV0156
Software: n/a
Vendor: WWWThreads
Version: 2006.11.25
Critical Level: low
Type: HTTP Response Splitting
Status: Unpatched. No reply from developer(s)
PoC: Available
Solution: Not available
Discovered by: Aliaksandr Hartsuyeu ( http://evuln.com/ )
--------Description--------
$_SERVER["HTTP_REFERER"] value is included in an HTTP response header sent to a web user without being validated for malicious characters.
Vulnerable script: reputation.php
--------PoC/Exploit--------
HTTP Response Splitting Example.

Vulnerable code: header("Location: ".$_SERVER["HTTP_REFERER"]);

HTTP query ("Referer" field):

Referer: http://some-link/\r\n[second new response]
---------Solution----------
Not available
----------Credit-----------
Vulnerability discovered by Aliaksandr Hartsuyeu
http://evuln.com/sql-injection/cookie.html - recent advisories about sql injections in cookies