Hello,
Your current version of apache 2.2.22 for http://aanbieding.marktplaats.com is vulnerable to many issues like DoS, XSS and Code Exec
DoS
Refer:
http://www.cvedetails.com/cve/CVE-2014-0231/
http://www.cvedetails.com/cve/CVE-2014-0098/
http://www.cvedetails.com/cve/CVE-2013-6438/
http://www.cvedetails.com/cve/CVE-2013-1896/
XSS
Refer:
http://www.cvedetails.com/cve/CVE-2012-4558/
http://www.cvedetails.com/cve/CVE-2012-3499/
Code Exec
Refer:
http://www.cvedetails.com/cve/CVE-2013-1862/
POC: Not available as it is well Known and fixed in newer versions of apache.
Please update it as soon as possible