CVE-2025-56200

Name: CVE-2025-56200
Creator: NVD / NIST
Published: 2025-09-30T18:15:50.307+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.30%

Last modified Jun 17, 2026

CVE-2025-56200 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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. EPSS estimates a 0.30% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.30%

21.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Validator Project	Validator	<= 3.15.15

References

http://validatorjs.comBroken Link
https://gist.github.com/junan-98/27ae092aa40e2a057d41a0f95148f666Exploit, Third Party Advisory
https://gist.github.com/junan-98/a93130505b258b9e4ec9f393e7533596Exploit, Third Party Advisory
https://github.com/validatorjs/validator.jsProduct

Timeline

Published: Sep 30, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-56200?

How severe is CVE-2025-56200?

CVE-2025-56200 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.30% probability of exploitation in the next 30 days.

How do I fix CVE-2025-56200?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-56200?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST