What is CVE-2017-20239?

CVE-2017-20239 is a medium-severity vulnerability in Dynalon Mdwiki, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-04-12.

How severe is CVE-2017-20239?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Dynalon Mdwiki

CVE-2017-20239

MDwiki contains a cross-site scripting vulnerability that allows remote attackers to execute arbitrary JavaScript by injecting malicious code through the location hash parameter. Attackers can craft URLs with JavaScript payloads in the hash fragment that are parsed and rendered without sanitization, causing the injected scripts to execute in the victim's browser context.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (18.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Dynalon Mdwiki — versions 0.6.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

disclosure@vulncheck.com (Exploit, VDB Entry, exploit)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2017-20239?: CVE-2017-20239 is a medium-severity vulnerability in Dynalon Mdwiki, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-04-12.
How severe is CVE-2017-20239?: Medium severity. CVSS v3 base score is 6.1 out of 10.