CVE-2025-56200Cross-site Scripting in Project Validator

Severity
6.1MEDIUMNVD
EPSS
0.0%
top 86.23%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedSep 30

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NExploitability: 2.8 | Impact: 2.7

Affected Packages2 packages

🔴Vulnerability Details

4
OSV
validator.js has a URL validation bypass vulnerability in its isURL function2025-09-30
OSV
CVE-2025-56200: A URL validation bypass vulnerability exists in validator2025-09-30
GHSA
validator.js has a URL validation bypass vulnerability in its isURL function2025-09-30
CVEList
CVE-2025-56200: A URL validation bypass vulnerability exists in validator2025-09-30
CVE-2025-56200 — Cross-site Scripting | cvebase