CVE-2026-24127
MEDIUMCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Lifecycle Timeline
4Description
Typemill is a flat-file, Markdown-based CMS designed for informational documentation websites. A reflected Cross-Site Scripting (XSS) exists in the login error view template `login.twig` of versions 2.19.1 and below. The `username` value can be echoed back without proper contextual encoding when authentication fails. An attacker can execute script in the login page context. This issue has been fixed in version 2.19.2.
Analysis
Reflected XSS in Typemill's login error page allows unauthenticated attackers to inject malicious scripts by crafting requests with specially formatted usernames, since the username parameter lacks proper encoding when displayed after failed authentication attempts. Typemill versions 2.19.1 and below are affected, and public exploit code exists for this vulnerability. …
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Remediation
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.
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External POC / Exploit Code
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