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CVE-2025-63709

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-11-10 · updated 2026-06-17
• Weakness: CWE-79

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.

Affected products

• SourceCodester Simple To-Do List System: 1.0

References

• https://github.com/floccocam-cpu/CVE-Research-2025/tree/main/CVE-2025-63709
• https://www.sourcecodester.com/php/17897/simple-do-list-system-using-php.html

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