CVE-2025-56200

Published: Sep 30, 2025Modified: Jul 5, 2026

6.1

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Exploitability: 2.8 / Impact: 2.7

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Description

A URL validation bypass vulnerability exists in validator.js through version 13.15.15. The isURL() function uses '://' as a delimiter to parse protocols, while browsers use ':' as the delimiter. This parsing difference allows attackers to bypass protocol and domain validation by crafting URLs leading to XSS and Open Redirect attacks.

Affected (1)

Products: Validator Project: Validator

Validator Project

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Validator Project Validator	Up to 3.15.15

Related CWEs

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

References (3)

https://gist.github.com/junan-98/27ae092aa40e2a057d41a0f95148f666

Source: cve@mitre.org

ExploitThird Party Advisory

https://gist.github.com/junan-98/a93130505b258b9e4ec9f393e7533596

Source: cve@mitre.org

ExploitThird Party Advisory

https://github.com/validatorjs/validator.js

Source: cve@mitre.org

Product

Timeline

No history available yet.