medium6.1
CVE-2025-56200
validator.js has a URL validation bypass vulnerability in its isURL function
Impact
A URL validation bypass vulnerability exists in validator.js prior to version 13.15.20. 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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | validator | < 13.15.20 | 13.15.20 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Validator Project | Validator | through 3.15.15 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://gist.github.com/junan-98/27ae092aa40e2a057d41a0f95148f666
- https://gist.github.com/junan-98/a93130505b258b9e4ec9f393e7533596
- https://github.com/validatorjs/validator.js
- https://github.com/advisories/GHSA-9965-vmph-33xx
- https://nvd.nist.gov/vuln/detail/CVE-2025-56200
- http://validatorjs.com
- https://github.com/validatorjs/validator.js/issues/2600
- https://github.com/validatorjs/validator.js/pull/2608
- https://github.com/validatorjs/validator.js/commit/cbef5088f02d36caf978f378bb845fe49bdc0809
- https://github.com/validatorjs/validator.js/releases/tag/13.15.20