CVE-2025-56200

6.1 MEDIUM
Published: September 30, 2025 Modified: October 18, 2025

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://validatorjs.com
Source: cve@mitre.org
Broken Link
https://gist.github.com/junan-98/27ae092aa40e2a057d41a0f95148f666
Source: cve@mitre.org
Exploit Third Party Advisory
https://gist.github.com/junan-98/a93130505b258b9e4ec9f393e7533596
Source: cve@mitre.org
Exploit Third Party Advisory
https://github.com/validatorjs/validator.js
Source: cve@mitre.org
Product

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
6.1 / 10.0
EPSS (Exploit Probability)
0.1%
17th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

validator_project