What is the CVSS score of CVE-2025-66403?

CVE-2025-66403 has a CVSS 3.1 base score of 4.6 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Filerise are affected by CVE-2025-66403?

Organizations using FileRise should be aware of moderate risk from CVE-2025-66403, a cross-site scripting vulnerability rated CVSS 4.6.. A patch is available.

Is there a public PoC exploit available for CVE-2025-66403?

Yes, a public proof-of-concept exploit is available for CVE-2025-66403. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2025-66403?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Filerise CVE-2025-66403

EUVD-2025-200112 MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2025-12-01 security-advisories@github.com

XSS File Upload Filerise

4.6

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

4.6 MEDIUM

AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

EUVD ID Assigned

Mar 15, 2026 - 13:34 euvd

EUVD-2025-200112

Analysis Generated

Mar 15, 2026 - 13:34 vuln.today

Patch released

Mar 15, 2026 - 13:34 nvd

Patch available

PoC Detected

Jan 07, 2026 - 20:50 vuln.today

Public exploit code

CVE Published

Dec 01, 2025 - 23:15 nvd

MEDIUM 4.6

DescriptionGitHub Advisory

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.

Analysis

Technical ContextAI

Cross-site scripting (XSS) allows injection of client-side scripts into web pages viewed by other users due to insufficient output encoding.

RemediationAI

A vendor patch is available — apply it immediately. Encode all user-supplied output contextually (HTML, JS, URL). Implement Content Security Policy (CSP) headers. Use HTTPOnly and Secure cookie flags.