What is CVE-2020-37103?

CVE-2020-37103 is a medium-severity vulnerability in Dnnsoftware Dotnetnuke, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-02-03.

How severe is CVE-2020-37103?

Medium severity. CVSS v3 base score is 6.4 out of 10.

XSS in Dnnsoftware Dotnetnuke

CVE-2020-37103

DotNetNuke 9.5 contains a persistent cross-site scripting vulnerability that allows normal users to upload malicious XML files with executable scripts through journal tools. Attackers can upload XML files with XHTML namespace scripts to ex…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.001 (24.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Dnnsoftware Dotnetnuke — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

ExploitDB-48124 (exploit)
DotNetNuke Official Vendor Homepage (product)
Vulnerability Analysis Blog Post (technical-description)
VulnCheck Advisory: DotNetNuke 9.5 - Persistent Cross-Site Scripting (third-party-advisory)

Frequently asked questions

What is CVE-2020-37103?: CVE-2020-37103 is a medium-severity vulnerability in Dnnsoftware Dotnetnuke, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-02-03.
How severe is CVE-2020-37103?: Medium severity. CVSS v3 base score is 6.4 out of 10.