GHSA-5634-rv46-48jf: Bleach Cross-Site Scripting Vulnerability

HIGH
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CWE-79
Published
Advisory Summary

GHSA-5634-rv46-48jf is a HIGH cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Bleach libraries in the npm ecosystem. The issue involves cross-site scripting in bleach. Remediation is available in the latest vendor maintenance releases.

GHSA-5634-rv46-48jf at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-5634-rv46-48jf
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Bleach
Package Ecosystem npm
Published Date
Last Updated

How to Fix GHSA-5634-rv46-48jf

To remediate this vulnerability, upgrade all affected Bleach dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

bleach fixed: Latest secure release 
npm install bleach@Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls bleach

How to Check if You Are Affected

To determine whether your Node.js application is affected by GHSA-5634-rv46-48jf, inspect your project dependencies using npm:

npm ls bleach

Analyze the terminal output to locate any version of Bleach in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The npm ls bleach command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where 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. In Bleach, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

All versions of `bleach` are vulnerable to Cross-Site Scripting. It is possible to bypass the package's HTML sanitization with payloads such as `"<<script><</script>script>alert('xss');</<script><</script>script>"` regardless of the passed options. This may allow attackers to execute arbitrary JavaScript in the victim's browser. ## Recommendation No fix is currently available. Consider using an alternative package until a fix is made available.

GHSA-5634-rv46-48jf Affected Bleach Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
bleach
npm/bleach
npm
≥ 0.0.0

References

www.npmjs.com/advisories/1034 WEB
https://www.npmjs.com/advisories/1034

Frequently Asked Questions

What is GHSA-5634-rv46-48jf?
GHSA-5634-rv46-48jf is a security vulnerability in Bleach involving Cross-Site Scripting in bleach under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Bleach versions are affected?
Affected versions include releases prior to current release patches across affected packages: bleach.
What version fixes GHSA-5634-rv46-48jf?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is bleach affected?
Yes, bleach is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What CWE is associated with GHSA-5634-rv46-48jf?
GHSA-5634-rv46-48jf is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (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.).
How can I check npm dependencies for GHSA-5634-rv46-48jf?
Run the dependency tree command: 'npm ls bleach'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-5634-rv46-48jf",
  "modified" : "2020-08-31T18:44:51Z",
  "published" : "2020-09-03T17:13:45Z",
  "aliases" : [ ],
  "summary" : "Cross-Site Scripting in bleach",
  "details" : "All versions of `bleach` are vulnerable to Cross-Site Scripting. It is possible to bypass the package's HTML sanitization with payloads such as `\"<<script><</script>script>alert('xss');</<script><</script>script>\"` regardless of the passed options. This may allow attackers to execute arbitrary JavaScript in the victim's browser.\n\n\n## Recommendation\n\nNo fix is currently available. Consider using an alternative package until a fix is made available.",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "bleach"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.0.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://www.npmjs.com/advisories/1034"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-08-31T18:44:51Z",
    "nvd_published_at" : null
  }
}