CVE-2025-56200

Published Sep 30, 2025 CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
Github GHSA Github GHSA GHSA-9965-vmph-33xx validator.js has a URL validation bypass vulnerability in its isURL function
History
Type Values Removed Values Added
First Time appeared Validator Project
Validator Project validator
CPEs cpe:2.3:a:validator_project:validator:*:*:*:*:*:node.js:*:*
Vendors & Products Validator Project
Validator Project validator
Type Values Removed Values Added
First Time appeared Validatorjs
Validatorjs validator.js
Vendors & Products Validatorjs
Validatorjs validator.js
Type Values Removed Values Added
Weaknesses CWE-79
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Jul 5, 2026, 1:11 AM
Reserved
Aug 16, 2025, 12:00 AM
Status
Modified
Published
Sep 30, 2025, 6:15 PM
Modified
Jul 5, 2026, 2:16 AM