Vulnerabilities in pkg:npm/posthog-js

PACKAGE
Advisory Identifier: GHSA-8775-5hwv-wr6v
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Advisory Summary

CVE-2023-32325 is a MODERATE (CVSS 5.4) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Posthog js libraries in the npm ecosystem. The issue involves potential for cross-site scripting in posthog-js. Remediation is available by upgrading affected packages to version 1.57.2.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:npm/posthog-js

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:npm/posthog-js. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-8775-5hwv-wr6v CVE-2023-32325 MODERATE Potential for cross-site scripting in PostHog-js

CVE-2023-32325 at a Glance

CVE Identifier CVE-2023-32325
GHSA Identifier GHSA-8775-5hwv-wr6v
Severity MODERATE
CVSS v3.1 Base Score 5.4
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Posthog js
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 5.4

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2023-32325

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

posthog-js fixed: 1.57.2 
npm install posthog-js@1.57.2
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 posthog-js

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2023-32325, inspect your project dependencies using npm:

npm ls posthog-js

Analyze the terminal output to locate any version of Posthog js in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.57.2), your application is affected.

Note: The npm ls posthog-js 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 Posthog js, 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

### Impact Potential for cross-site scripting in `posthog-js`. ### Patches The problem has been patched in `posthog-js` version 1.57.2. ### Workarounds - This isn't an issue for sites that have a Content Security Policy in place. - Using the HTML tracking snippet on PostHog Cloud always guarantees the latest version of the library – in that case no action is required to upgrade to the patched version. ### References We will publish details of the vulnerability in 30 days as per our [security policy](https://posthog.com/handbook/company/security#policies).

CVE-2023-32325 Affected Posthog js Versions

1 component(s)
Fixed Versions:
1.57.2
Product / Package Ecosystem Affected Versions Fixed Version
posthog-js
npm/posthog-js
npm
< 1.57.2
1.57.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/PostHog/posthog-js/security/advisories/GHSA-8775-5hwv-wr6v
NVD — CVE-2023-32325 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-32325
Posthog js Source Repository REPOSITORY
https://github.com/PostHog/posthog-js/pull/630
Security Fix Commit FIX COMMIT
https://github.com/PostHog/posthog-js/commit/67e07eb8bb271a3a6f4aa251382e4d25abb385a0
Posthog js Source Repository REPOSITORY
https://github.com/PostHog/posthog-js

Frequently Asked Questions

What is CVE-2023-32325?
CVE-2023-32325 is a security vulnerability in Posthog js involving Potential for cross-site scripting in PostHog-js under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Posthog js versions are affected?
Affected versions include releases prior to 1.57.2 across affected packages: posthog-js.
What version fixes CVE-2023-32325?
Upgrading to 1.57.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is posthog-js affected?
Yes, posthog-js is affected in releases prior to 1.57.2. Upgrade your dependency to 1.57.2 or later.
What is the CVSS score of CVE-2023-32325?
CVE-2023-32325 has a CVSS v3.1 base score of 5.4 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2023-32325?
CVE-2023-32325 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 CVE-2023-32325?
Run the dependency tree command: 'npm ls posthog-js'. 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-8775-5hwv-wr6v",
  "modified" : "2023-05-29T16:13:02Z",
  "published" : "2023-05-22T20:35:03Z",
  "aliases" : [ "CVE-2023-32325" ],
  "summary" : "Potential for cross-site scripting in PostHog-js",
  "details" : "### Impact\n\nPotential for cross-site scripting in `posthog-js`.\n\n### Patches\n\nThe problem has been patched in `posthog-js` version 1.57.2.\n\n### Workarounds\n\n- This isn't an issue for sites that have a Content Security Policy in place.\n- Using the HTML tracking snippet on PostHog Cloud always guarantees the latest version of the library – in that case no action is required to upgrade to the patched version.\n\n### References\n\nWe will publish details of the vulnerability in 30 days as per our [security policy](https://posthog.com/handbook/company/security#policies).\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "posthog-js"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.57.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/PostHog/posthog-js/security/advisories/GHSA-8775-5hwv-wr6v"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-32325"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/PostHog/posthog-js/pull/630"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/PostHog/posthog-js/commit/67e07eb8bb271a3a6f4aa251382e4d25abb385a0"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/PostHog/posthog-js"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-05-22T20:35:03Z",
    "nvd_published_at" : "2023-05-27T00:15:09Z"
  }
}