GHSA-x3cc-x39p-42qx

Source

https://github.com/advisories/GHSA-x3cc-x39p-42qx

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/06/GHSA-x3cc-x39p-42qx/GHSA-x3cc-x39p-42qx.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-x3cc-x39p-42qx

Aliases

Downstream

MINI-pgw7-9pgj-556w

Published

2023-06-13T12:44:34Z

Modified

2026-07-08T06:49:36Z

Severity

6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N CVSS Calculator

Summary

fast-xml-parser vulnerable to Prototype Pollution through tag or attribute name

Details

Impact

As a part of this vulnerability, user was able to se code using __proto__ as a tag or attribute name.

const { XMLParser, XMLBuilder, XMLValidator} = require("fast-xml-parser");

let XMLdata = "<__proto__><polluted>hacked</polluted></__proto__>"

const parser = new XMLParser();
let jObj = parser.parse(XMLdata);

console.log(jObj.polluted) // should return hacked

Patches

The problem has been patched in v4.1.2

Workarounds

User can check for "proto" in the XML string before parsing it to the parser.

References

https://gist.github.com/Sudistark/a5a45bd0804d522a1392cb5023aa7ef7

Database specific

{
    "cwe_ids":  [
        "CWE-1321"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2023-06-13T12:44:34Z",
    "nvd_published_at":  "2023-12-12T17:15:07Z",
    "severity":  "MODERATE"
}

References

Affected packages

npm / fast-xml-parser

Package

Name: fast-xml-parser; View open source insights on deps.dev
Purl: pkg:npm/fast-xml-parser

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

4.1.2

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/06/GHSA-x3cc-x39p-42qx/GHSA-x3cc-x39p-42qx.json"