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Open Redirect in url-parse

Critical severity GitHub Reviewed Published Aug 13, 2018 to the GitHub Advisory Database • Updated Jan 23, 2026

Package

npm url-parse (npm)

Affected versions

>= 1.0.0, < 1.4.3

Patched versions

1.4.3

Description

Versions of url-parse before 1.4.3 returns the wrong hostname which could lead to Open Redirect, Server Side Request Forgery (SSRF), or Bypass Authentication Protocol vulnerabilities.

Recommendation

Update to version 1.4.3 or later.

References

Published to the GitHub Advisory Database Aug 13, 2018
Reviewed Jun 16, 2020
Last updated Jan 23, 2026

Severity

Critical

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(76th percentile)

Weaknesses

Direct Request ('Forced Browsing')

The web application does not adequately enforce appropriate authorization on all restricted URLs, scripts, or files. Learn more on MITRE.

CVE ID

CVE-2018-3774

GHSA ID

GHSA-pv4c-p2j5-38j4

Source code

Credits

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