GHSA-qxrj-hx23-xp82

Suggest an improvement
Source
https://github.com/advisories/GHSA-qxrj-hx23-xp82
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/12/GHSA-qxrj-hx23-xp82/GHSA-qxrj-hx23-xp82.json
JSON Data
https://api.test.osv.dev/v1/vulns/GHSA-qxrj-hx23-xp82
Aliases
Related
Published
2023-12-11T21:46:21Z
Modified
2023-12-12T00:46:36Z
Severity
  • 8.6 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N CVSS Calculator
Summary
Overly permissive origin policy
Details

Currently, the middleware operates in a way that if an allowed origin is not provided, it will return an Access-Control-Allow-Origin header with the value of the origin from the request. This behavior completely disables one of the most crucial elements of browsers - the Same Origin Policy (SOP), this could cause a very serious security threat to the users of this middleware.

If such behavior is expected, for instance, when middleware is used exclusively for prototypes and not for production applications, it should be heavily emphasized in the documentation along with an indication of the risks associated with such behavior, as many users may not be aware of it.

Database specific
{
    "nvd_published_at": "2023-12-11T23:15:07Z",
    "cwe_ids": [
        "CWE-346"
    ],
    "severity": "HIGH",
    "github_reviewed": true,
    "github_reviewed_at": "2023-12-11T21:46:21Z"
}
References

Affected packages

npm / @koa/cors

Package

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.0.0