CVE-2025-63709 Cross-site scripting in n/a
An authenticated user can inject malicious scripts into the task list, leading to arbitrary code execution in the victim's browser.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-63709?
CVE-2025-63709 is a medium-severity cross-site scripting vulnerability in n/a, published on 10 Nov 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2025-63709?
It affects 1 product.
Products include Chuck24 Simple To-Do List System.
How do I fix CVE-2025-63709?
No fix has been published for CVE-2025-63709 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2025-63709 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-63709 exists.
Other vulnerabilities in n/a
Sources
Also known as GHSA-4x55-4jgw-65pj.