CVE-2021-32737: Sulu/sulu Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-gm2x-6475-g9r8
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CVSS 4.8
CWE-79
Published
Advisory Summary

CVE-2021-32737 is a MODERATE (CVSS 4.8) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Sulu/sulu libraries in the Packagist ecosystem. The issue involves xss injection in media collection title was possible. Remediation is available by upgrading affected packages to version 1.6.41.

CVE-2021-32737 at a Glance

CVE Identifier CVE-2021-32737
GHSA Identifier GHSA-gm2x-6475-g9r8
Severity MODERATE
CVSS v3.1 Base Score 4.8
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product Sulu/sulu
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 4.8

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required High (PR:H)
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-2021-32737

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

sulu/sulu fixed: 1.6.41 
Upgrade sulu/sulu to 1.6.41
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 sulu/sulu

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-32737, inspect your project dependencies for Sulu/sulu:

inspect dependencies for sulu/sulu

Analyze the terminal output to locate any version of Sulu/sulu in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.6.41), 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 Sulu/sulu, 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 A logged in admin user was possible to add a script injection (XSS) in the collection title which was executed. ### Workarounds Manual patching the js files. ### For more information If you have any questions or comments about this advisory:' - Email us at [security@sulu.io](mailto:security@sulu.io)

CVE-2021-32737 Affected Sulu/sulu Versions

1 component(s)
Fixed Versions:
1.6.41
Product / Package Ecosystem Affected Versions Fixed Version
sulu/sulu
 Packagist
< 1.6.41
1.6.41

References

GitHub Advisory / Wiki ADVISORY
https://github.com/sulu/sulu/security/advisories/GHSA-gm2x-6475-g9r8
NVD — CVE-2021-32737 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-32737
Sulu/sulu Release RELEASE
https://github.com/sulu/sulu/releases/tag/1.6.41

Frequently Asked Questions

What is CVE-2021-32737?
CVE-2021-32737 is a security vulnerability in Sulu/sulu involving XSS Injection in Media Collection Title was possible under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Sulu/sulu versions are affected?
Affected versions include releases prior to 1.6.41 across affected packages: sulu/sulu.
What version fixes CVE-2021-32737?
Upgrading to 1.6.41 (or the latest patched release for your respective branch) resolves the vulnerability.
Is sulu/sulu affected?
Yes, sulu/sulu is affected in releases prior to 1.6.41. Upgrade your dependency to 1.6.41 or later.
What is the CVSS score of CVE-2021-32737?
CVE-2021-32737 has a CVSS v3.1 base score of 4.8 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.
What CWE is associated with CVE-2021-32737?
CVE-2021-32737 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-2021-32737?
Run the dependency tree command: 'inspect dependencies for sulu/sulu'. 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-gm2x-6475-g9r8",
  "modified" : "2021-07-13T14:57:56Z",
  "published" : "2021-07-02T18:32:18Z",
  "aliases" : [ "CVE-2021-32737" ],
  "summary" : "XSS Injection in Media Collection Title was possible",
  "details" : "### Impact\n\nA logged in admin user was possible to add a script injection (XSS) in the collection title which was executed.\n\n### Workarounds\n\nManual patching the js files.\n\n### For more information\n\nIf you have any questions or comments about this advisory:'\n\n - Email us at [security@sulu.io](mailto:security@sulu.io)\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "sulu/sulu"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.6.41"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/sulu/sulu/security/advisories/GHSA-gm2x-6475-g9r8"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-32737"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/sulu/sulu/releases/tag/1.6.41"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-07-02T18:03:48Z",
    "nvd_published_at" : "2021-07-02T18:15:00Z"
  }
}