CVE-2025-56200

medium

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

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

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

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

http://validatorjs.com

Details

Source: Mitre, NVD

Published: 2025-09-30

Updated: 2025-10-02

Risk Information

CVSS v2

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 6.1

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

Severity: Medium

EPSS

EPSS: 0.00031