Vulnerability identifier: #VU25722

Vulnerability risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-5186

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
DotNetNuke
Web applications / CMS

Vendor: DNN

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data. A remote attacker can trick the victim to open a specially crafted XML file and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation
Install update from vendor's website.

Vulnerable software versions

DotNetNuke: 9.0.0 - 9.4.4

---

External links
http://github.com/dnnsoftware/Dnn.Platform/releases
http://medium.com/@SajjadPourali/dnn-dotnetnuke-cms-not-as-secure-as-you-think-e8516f789175
http://packetstormsecurity.com/files/156483/DotNetNuke-CMS-9.5.0-Cross-Site-Scripting.html

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.