CVE-2025-63709: CHUCK24 Simple To-Do List System

Medium severity, CVSS 5.4. EPSS: 0.2% chance of exploitation in the next 30 days.

A Cross-Site Scripting (XSS) vulnerability exists in SourceCodester Simple To-Do List System 1.0 in the "Add Tasks" text input. An authenticated user can submit HTML/JavaScript that is not correctly sanitized or encoded on output. The injected script is stored and later rendered in the browser of any user who views the task, allowing execution of arbitrary script in the context of the victim's browser.

Affected products

• CHUCK24 Simple To-Do List System: version 1.0 only

Published 2025-11-10. Last modified 2026-06-17.