Typemill
CVE-2026-24127
MEDIUM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Output encoding, context-aware escaping
MITRE ATT&CK
2 techniques across 2 tactics: Initial Access, Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS 5.4 (MEDIUM). Attack vector: Network. Complexity: Low. Privileges required: None. User interaction: Required. Public exploit/POC available. |
| Exploit ScenarioDerived | An attacker could exploit this vulnerability to compromise the affected system. |
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Alert meAnalysisAIv1 – Mar 12, 2026
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. Version 2.19.2 contains the fix.
Earlier versions of this analysis (1)
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. [CVSS 5.4 MEDIUM]
RemediationAI
A vendor patch is available — apply it immediately. Fixed in version 2.19.2.. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.
Affects your stack
Find out whether the stacks and servers you run are on an affected version.
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Classified as CWE-79 (Cross-site Scripting (XSS)). Affects Typemill. 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.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
Lifecycle Timeline
3DescriptionGitHub Advisory
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.
Executive ViewAI
Organizations using Typemill should be aware of moderate risk from CVE-2026-24127, a cross-site scripting vulnerability rated CVSS 5.4. Attackers could inject scripts to steal sessions or perform actions as authenticated users. Proof-of-concept code is publicly available. A patch is available and should be applied during regular vulnerability management.
Apply vendor patch. If patching is delayed: implement CSP headers, enable HttpOnly cookies, deploy WAF XSS rules.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.
Affected Products (CPE)GitHub Advisory
Typemill v1.5.3 was discovered to contain an arbitrary file upload vulnerability via the upload function. Rated high sev
Credential brute-forcing against Typemill CMS (versions up to and including 2.25.0) is possible because its primary pass
Stored HTML attribute injection in Typemill versions prior to 2.23.0 allows authenticated content editors to embed arbit
Arbitrary file read in Typemill before 2.24.0 allows authenticated Author-level users to traverse outside the content di
Persistent XSS in Typemill CMS 2.x enables authenticated users holding theme-configuration access to store malicious Jav
Stored cross-site scripting in the Typemill flat-file CMS through 2.26.0 allows an authenticated user with media/image u
Exploit-DB