XSS in Typemill
CVE-2026-24127
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (22.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 22.6% 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
- Typemill — versions < v2.19.2
Weakness classification (CWE)
References
- github.com/typemill/typemill/security/advisories/GHSA-65x4-pjhj-r8wr (Exploit, Third Party Advisory)
- github.com/typemill/typemill/commit/b506acd11e80fb9c8db5fa6c2c8ad73580b4e88c (Patch)
- github.com/typemill/typemill/releases/tag/v2.19.2 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-24127?
- CVE-2026-24127 is a medium-severity vulnerability in Typemill, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-01-23.
- How severe is CVE-2026-24127?
- Medium severity. CVSS v3 base score is 5.4 out of 10.