CVE-2025-66403: FileRise Vulnerable to Stored XSS via SVG Upload

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-12-01 · updated 2026-10-18
Weakness: CWE-79

Description

FileRise is a self-hosted web-based file manager with multi-file upload, editing, and batch operations. Prior to 2.2.3, a stored cross-site scripting (XSS) vulnerability exists in the Filerise application due to improper handling of uploaded SVG files. The application accepts user-supplied SVG uploads without sanitizing or restricting embedded script content. When a malicious SVG containing inline JavaScript or event-based payloads is uploaded, it is later rendered directly in the browser whenever viewed within the application. Because SVGs are XML-based and allow scripting, they execute in the origin context of the application, enabling full stored XSS. This vulnerability is fixed in 2.2.3.

Affected products

error311 FileRise: before 2.2.3 — fixed in 2.2.3

How to fix

Upgrade to a fixed version: error311 FileRise 2.2.3. Check the vendor advisory for mitigations.

References

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