Leo Spratt

4 exploits Active since Jul 2024
CVE-2026-40262 WRITEUP HIGH WRITEUP
Note Mark has Stored XSS via Unrestricted Asset Upload
Note Mark is an open-source note-taking application. In versions 0.19.1 and prior, the asset delivery handler serves uploaded files inline and relies on magic-byte detection for content type, which does not identify text-based formats such as HTML, SVG, or XHTML. These files are served with an empty Content-Type, no X-Content-Type-Options: nosniff header, and inline disposition, allowing browsers to sniff and render active content. An authenticated user can upload an HTML or SVG file containing JavaScript as a note asset, and when a victim navigates to the asset URL, the script executes under the application's origin with access to the victim's authenticated session and API actions. This issue has been fixed in version 0.19.2.
CVSS 8.7
CVE-2026-40263 WRITEUP LOW WRITEUP
Note Mark: Username Enumeration via Login Endpoint Timing Side-Channel
Note Mark is an open-source note-taking application. In versions 0.19.1 and prior, the login endpoint performs bcrypt password verification only when the supplied username exists, returning immediately for nonexistent usernames. This timing discrepancy allows unauthenticated attackers to enumerate valid usernames by measuring response times, enabling targeted credential attacks. This issue has been fixed in version 0.19.2.
CVSS 3.7
CVE-2026-40265 WRITEUP MEDIUM WRITEUP
Note Mark has Broken Access Control on Asset Download
Note Mark is an open-source note-taking application. In versions 0.19.1 and prior, the asset download endpoint at /api/notes/{noteID}/assets/{assetID} is registered without authentication middleware, and the backend query does not verify ownership or book visibility. An unauthenticated user who knows a valid note ID and asset ID can retrieve the full contents of private note assets without authentication, regardless of whether the associated book is public or private. This issue has been fixed in version 0.19.2.
CVSS 5.9
CVE-2024-41819 WRITEUP HIGH WRITEUP
Enchantedcode Note Mark < 0.13.1 - XSS
Note Mark is a web-based Markdown notes app. A stored cross-site scripting (XSS) vulnerability in Note Mark allows attackers to execute arbitrary web scripts via a crafted payload injected into the URL value of a link in the markdown content. This vulnerability is fixed in 0.13.1.
CVSS 8.7