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Vulnerabilities CVE-2026-44401

CVE-2026-44401

Medium
Open
TLP:CLEAR

Typemill CMS 2.x Persistent XSS via Markdown javascript URI

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Description

Typemill CMS version 2.x contains a persistent cross-site scripting vulnerability in the Markdown parser extension that allows authenticated users with theme-configuration access to inject malicious JavaScript URIs by supplying unsanitized href values in Markdown links. Attackers can craft Markdown links using the javascript: scheme through ParsedownExtension.php or TwigMarkdownExtension.php, storing a persistent payload that executes in the browser of every visitor who clicks the link, enabling session cookie theft, authenticated request forgery, and credential harvesting.

Details

CVSS Score
4.6
EPSS Score
0.23%

14th percentile

CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L
Confidence
90%
Published
Aug 10, 2026
Last Modified
Aug 11, 2026
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