CVE-2021-32245: Pagekit/pagekit Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-mrwr-2945-fr22
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CVSS 5.4
CWE-79
Published
Advisory Summary

CVE-2021-32245 is a MODERATE (CVSS 5.4) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Pagekit/pagekit libraries in the Packagist ecosystem. The issue involves cross-site scripting in pagekit. Remediation is available in the latest vendor maintenance releases.

CVE-2021-32245 at a Glance

CVE Identifier CVE-2021-32245
GHSA Identifier GHSA-mrwr-2945-fr22
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 Pagekit/pagekit
Package Ecosystem Packagist
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-2021-32245

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

pagekit/pagekit fixed: Latest secure release 
Upgrade pagekit/pagekit to 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: 

inspect dependencies for pagekit/pagekit

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-32245, inspect your project dependencies for Pagekit/pagekit:

inspect dependencies for pagekit/pagekit

Analyze the terminal output to locate any version of Pagekit/pagekit 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: Verify declared build manifests and deployed runtime container environments.

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 Pagekit/pagekit, 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

In PageKit v1.0.18, a user can upload SVG files in the file upload portion of the CMS. These SVG files can contain malicious scripts. This file will be uploaded to the system and it will not be stripped or filtered. The user can create a link on the website pointing to "/storage/exp.svg" that will point to http://localhost/pagekit/storage/exp.svg. When a user comes along to click that link, it will trigger a XSS attack.

CVE-2021-32245 Affected Pagekit/pagekit Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
pagekit/pagekit
 Packagist
≤ 1.0.18

References

NVD — CVE-2021-32245 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-32245
Pagekit/pagekit Source Repository REPOSITORY
https://github.com/pagekit/pagekit/issues/963

Frequently Asked Questions

What is CVE-2021-32245?
CVE-2021-32245 is a security vulnerability in Pagekit/pagekit involving Cross-site scripting in PageKit under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Pagekit/pagekit versions are affected?
Affected versions include releases prior to current release patches across affected packages: pagekit/pagekit.
What version fixes CVE-2021-32245?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is pagekit/pagekit affected?
Yes, pagekit/pagekit is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2021-32245?
CVE-2021-32245 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-2021-32245?
CVE-2021-32245 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 Packagist dependencies for CVE-2021-32245?
Run the dependency tree command: 'inspect dependencies for pagekit/pagekit'. 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-mrwr-2945-fr22",
  "modified" : "2021-06-23T18:44:29Z",
  "published" : "2021-06-22T15:17:28Z",
  "aliases" : [ "CVE-2021-32245" ],
  "summary" : "Cross-site scripting in PageKit",
  "details" : "In PageKit v1.0.18, a user can upload SVG files in the file upload portion of the CMS. These SVG files can contain malicious scripts. This file will be uploaded to the system and it will not be stripped or filtered. The user can create a link on the website pointing to \"/storage/exp.svg\" that will point to http://localhost/pagekit/storage/exp.svg. When a user comes along to click that link, it will trigger a XSS attack.",
  "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" : "Packagist",
      "name" : "pagekit/pagekit"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.0.18"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-32245"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pagekit/pagekit/issues/963"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-06-17T17:32:02Z",
    "nvd_published_at" : "2021-06-16T21:15:00Z"
  }
}