CVE-2025-56200
Unknown
Unknown - Not Provided
BaseFortify
Publication date: 2025-09-30
Last updated on: 2025-10-18
Assigner: MITRE
Description
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 Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| validator_project | validator | to 3.15.15 (inc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a URL validation bypass in validator.js up to version 13.15.15. The isURL() function incorrectly uses '://' as a delimiter to parse protocols, whereas browsers use ':' as the delimiter. This discrepancy allows attackers to craft URLs that bypass protocol and domain validation checks.
How can this vulnerability impact me? :
The vulnerability can lead to security issues such as Cross-Site Scripting (XSS) and Open Redirect attacks by allowing attackers to bypass URL validation and trick applications into accepting malicious URLs.
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