CVE-2023-33196: Craftcms/cms Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-cjmm-x9x9-m2w5
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CVSS 5.5
CWE-80 CWE-79
Published
Advisory Summary

CVE-2023-33196 is a MODERATE (CVSS 5.5) cross-site scripting vulnerability (CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)) affecting Craftcms/cms libraries in the Packagist ecosystem. The issue involves craft cms stored xss in review volume. Remediation is available by upgrading affected packages to version 4.4.7.

CVE-2023-33196 at a Glance

CVE Identifier CVE-2023-33196
GHSA Identifier GHSA-cjmm-x9x9-m2w5
Severity MODERATE
CVSS v3.1 Base Score 5.5
CWE Classification CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
Affected Product Craftcms/cms
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 5.5

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:U/C:L/I:L/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2023-33196

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

craftcms/cms fixed: 4.4.7 
Upgrade craftcms/cms to 4.4.7
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 craftcms/cms

How to Check if You Are Affected

To determine whether your application is affected by CVE-2023-33196, inspect your project dependencies for Craftcms/cms:

inspect dependencies for craftcms/cms

Analyze the terminal output to locate any version of Craftcms/cms in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.4.7), 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-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS), where the product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages. In Craftcms/cms, 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

### Summary XSS can be triggered by review volumes ### PoC 1. Access setting tab 2. Create new assets 3. In assets name inject payload: "<script>alert(1337)</script> 4. Click Utilities tab 5. Choose all volumes, or volume trigger xss 6. Click Update asset indexes. 7. Wait to assets update success. 8. Progress complete. 9. Click on review button will trigger XSS ### Root cause Function: index.php?p=admin/actions/asset-indexes/process-indexing-session&v=1680710595770 After loading completed, progess will load: "skippedEntries" and "missingEntries" These parameters is not yet filtered, I just tried "skippedEntries" but I think it will be work with "missingEntries" ### My reponse: { "session": { "id": 10, "indexedVolumes": { "6": "\"<script>alert(1337)</script>" }, "totalEntries": 2235, "processedEntries": 2235, "cacheRemoteImages": true, "listEmptyFolders": false, "isCli": false, "actionRequired": true, "dateCreated": "Apr 5, 2023, 9:03:16 AM", "skippedEntries": [ "\"<script>alert(1337)</script>/assetpreviews/Image.php", "\"<script>alert(1337)</script>/assetpreviews/Pdf.php" ], "missingEntries": { "folders": [], "files": [] }, "processIfRootEmpty": false }, "skipDialog": false } Resolved in https://github.com/craftcms/cms/commit/053d7119697e480ff81c5723bb9a33eaa49e0fc7

CVE-2023-33196 Affected Craftcms/cms Versions

1 component(s)
Fixed Versions:
4.4.7
Product / Package Ecosystem Affected Versions Fixed Version
craftcms/cms
 Packagist
≥ 4.0.0-RC1
< 4.4.7
4.4.7

References

GitHub Advisory / Wiki ADVISORY
https://github.com/craftcms/cms/security/advisories/GHSA-cjmm-x9x9-m2w5
NVD — CVE-2023-33196 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-33196
Security Fix Commit FIX COMMIT
https://github.com/craftcms/cms/commit/053d7119697e480ff81c5723bb9a33eaa49e0fc7
Craftcms/cms Source Repository REPOSITORY
https://github.com/craftcms/cms
Craftcms/cms Release RELEASE
https://github.com/craftcms/cms/releases/tag/4.4.7

Frequently Asked Questions

What is CVE-2023-33196?
CVE-2023-33196 is a security vulnerability in Craftcms/cms involving Craft CMS stored XSS in review volume under CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS).
Which Craftcms/cms versions are affected?
Affected versions include releases prior to 4.4.7 across affected packages: craftcms/cms.
What version fixes CVE-2023-33196?
Upgrading to 4.4.7 (or the latest patched release for your respective branch) resolves the vulnerability.
Is craftcms/cms affected?
Yes, craftcms/cms is affected in releases prior to 4.4.7. Upgrade your dependency to 4.4.7 or later.
What is the CVSS score of CVE-2023-33196?
CVE-2023-33196 has a CVSS v3.1 base score of 5.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L.
What CWE is associated with CVE-2023-33196?
CVE-2023-33196 is classified under CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) (The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages.).
How can I check Packagist dependencies for CVE-2023-33196?
Run the dependency tree command: 'inspect dependencies for craftcms/cms'. 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-cjmm-x9x9-m2w5",
  "modified" : "2023-05-26T21:50:36Z",
  "published" : "2023-05-26T13:55:42Z",
  "aliases" : [ "CVE-2023-33196" ],
  "summary" : "Craft CMS stored XSS in review volume",
  "details" : "### Summary\nXSS can be triggered by review volumes\n\n### PoC\n\n    1. Access setting tab\n    2. Create new assets\n    3. In assets name inject payload: \"<script>alert(1337)</script>\n    4. Click Utilities tab\n    5. Choose all volumes, or volume trigger xss\n    6. Click Update asset indexes.\n    7. Wait to assets update success.\n    8. Progress complete.\n    9. Click on review button will trigger XSS\n\n### Root cause\nFunction: index.php?p=admin/actions/asset-indexes/process-indexing-session&v=1680710595770\nAfter loading completed, progess will load: \n\"skippedEntries\"\nand\n\"missingEntries\"\nThese parameters is not yet filtered, I just tried \"skippedEntries\" but I think it will be work with \"missingEntries\"\n\n### My reponse:\n{\n  \"session\": {\n    \"id\": 10,\n    \"indexedVolumes\": {\n      \"6\": \"\\\"<script>alert(1337)</script>\"\n    },\n    \"totalEntries\": 2235,\n    \"processedEntries\": 2235,\n    \"cacheRemoteImages\": true,\n    \"listEmptyFolders\": false,\n    \"isCli\": false,\n    \"actionRequired\": true,\n    \"dateCreated\": \"Apr 5, 2023, 9:03:16 AM\",\n    \"skippedEntries\": [\n      \"\\\"<script>alert(1337)</script>/assetpreviews/Image.php\",\n      \"\\\"<script>alert(1337)</script>/assetpreviews/Pdf.php\"\n    ],\n    \"missingEntries\": {\n      \"folders\": [],\n      \"files\": []\n    },\n    \"processIfRootEmpty\": false\n  },\n  \"skipDialog\": false\n}\n\n\n\nResolved in https://github.com/craftcms/cms/commit/053d7119697e480ff81c5723bb9a33eaa49e0fc7",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "craftcms/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.0.0-RC1"
      }, {
        "fixed" : "4.4.7"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 4.4.6"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/craftcms/cms/security/advisories/GHSA-cjmm-x9x9-m2w5"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-33196"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/craftcms/cms/commit/053d7119697e480ff81c5723bb9a33eaa49e0fc7"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/craftcms/cms"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/craftcms/cms/releases/tag/4.4.7"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79", "CWE-80" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-05-26T13:55:42Z",
    "nvd_published_at" : "2023-05-26T21:15:21Z"
  }
}