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 execute arbitrary JavaScript in users' browsers, potentially bypassing CSRF protections and performing more damaging attacks.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (21.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Dnnsoftware Dotnetnuke — versions 0
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/48124 (Exploit, VDB Entry, Third Party Advisory, exploit)
- dnnsoftware.com/ (Product, product)
- medium.com/@SajjadPourali/dnn-dotnetnuke-cms-not-as-secure-as-you-think-e8516f7… (technical-description, Third Party Advisory)
- www.vulncheck.com/advisories/dotnetnuke-persistent-cross-site-scripting (Third Party Advisory, 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.