What’s Vulnerable › Vulnerabilities

CVE-2025-56200

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-09-30 · updated 2026-07-05
• Weakness: CWE-79

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.

Affected products

• validatorjs/validator.js: through 3.15.15

References

• https://gist.github.com/junan-98/27ae092aa40e2a057d41a0f95148f666
• https://gist.github.com/junan-98/a93130505b258b9e4ec9f393e7533596
• https://github.com/validatorjs/validator.js

Get alerted when CVE-2025-56200 or the next vulnerability affects your stack