CVE-2026-44401

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.

CVSS v4.0

4.6 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

4.8 MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

EPSS

0.28% chance of exploitation in the next 30 days, 20th percentile

Published

2026-08-10

Updated

2026-08-14

Proof-of-concept exploits (1)

• sn0x-sharma/CVE-2026-444012★ · 2026-08-11

References

• CVE Record
• NVD entry

Related

• CVE-2026-18718
• CVE-2026-57850
• CVE-2026-44381
• CVE-2026-44403
• CVE-2026-44376
• CVE-2026-44423