CVE-2023-44383: October/system Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-rvx8-p3xp-fj3p
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CVSS 5.4
CWE-79
Published
Advisory Summary

CVE-2023-44383 is a MODERATE (CVSS 5.4) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting October/system libraries in the Packagist ecosystem. The issue involves october cms stored xss by authenticated backend user with improper configuration. Remediation is available by upgrading affected packages to version 3.5.2.

CVE-2023-44383 at a Glance

CVE Identifier CVE-2023-44383
GHSA Identifier GHSA-rvx8-p3xp-fj3p
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 October/system
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-2023-44383

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

october/system fixed: 3.5.2 
Upgrade october/system to 3.5.2
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 october/system

How to Check if You Are Affected

To determine whether your application is affected by CVE-2023-44383, inspect your project dependencies for October/system:

inspect dependencies for october/system

Analyze the terminal output to locate any version of October/system in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 3.5.2), 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 October/system, 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 user with access to the media manager that stores SVG files could create a stored XSS attack against themselves and any other user with access to the media manager when SVG files are supported. SVG files are supported by default in v3 for convenience; however, this has resulted in multiple mistaken vulnerability reports from security researchers. As per the documentation, if a backend user is not trusted, the advice is to remove the `svg` extension from the list of supported file types. ### Patches The issue has been patched in v3.5.2 by including an SVG sanister. It is enabled by default for new installations but must be enabled for existing sites in the **config/media.php** file. ``` 'clean_vectors' => true, ``` ### Workarounds If you cannot upgrade for this patch, follow the pervious advice and remove `svg` from the supported file types. ### References - https://github.com/octobercms/october/blob/3.x/config/media.php Credits to: - Faris Krivic - Okan Kurtulus - Aldin Visnjic - Bug Shankar ### For more information If you have any questions or comments about this advisory: * Email us at [hello@octobercms.com](mailto:hello@octobercms.com)

CVE-2023-44383 Affected October/system Versions

1 component(s)
Fixed Versions:
3.5.2
Product / Package Ecosystem Affected Versions Fixed Version
october/system
 Packagist
≥ 3.0.0
< 3.5.2
3.5.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/octobercms/october/security/advisories/GHSA-rvx8-p3xp-fj3p
NVD — CVE-2023-44383 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-44383
Security Fix Commit FIX COMMIT
https://github.com/octobercms/october/commit/b7eed0bbf54d07ff310fcdc7037a8e8bf1f5043b
October/system Source Repository REPOSITORY
https://github.com/octobercms/october

Frequently Asked Questions

What is CVE-2023-44383?
CVE-2023-44383 is a security vulnerability in October/system involving October CMS stored XSS by authenticated backend user with improper configuration under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which October/system versions are affected?
Affected versions include releases prior to 3.5.2 across affected packages: october/system.
What version fixes CVE-2023-44383?
Upgrading to 3.5.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is october/system affected?
Yes, october/system is affected in releases prior to 3.5.2. Upgrade your dependency to 3.5.2 or later.
What is the CVSS score of CVE-2023-44383?
CVE-2023-44383 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-2023-44383?
CVE-2023-44383 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-2023-44383?
Run the dependency tree command: 'inspect dependencies for october/system'. 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-rvx8-p3xp-fj3p",
  "modified" : "2023-11-29T21:45:31Z",
  "published" : "2023-11-29T21:45:31Z",
  "aliases" : [ "CVE-2023-44383" ],
  "summary" : "October CMS stored XSS by authenticated backend user with improper configuration",
  "details" : "### Impact\n\nA user with access to the media manager that stores SVG files could create a stored XSS attack against themselves and any other user with access to the media manager when SVG files are supported.\n\nSVG files are supported by default in v3 for convenience; however, this has resulted in multiple mistaken vulnerability reports from security researchers. As per the documentation, if a backend user is not trusted, the advice is to remove the `svg` extension from the list of supported file types.\n\n### Patches\n\nThe issue has been patched in v3.5.2 by including an SVG sanister. It is enabled by default for new installations but must be enabled for existing sites in the **config/media.php** file.\n\n```\n'clean_vectors' => true,\n```\n\n### Workarounds\n\nIf you cannot upgrade for this patch, follow the pervious advice and remove `svg` from the supported file types.\n\n### References\n\n- https://github.com/octobercms/october/blob/3.x/config/media.php\n\nCredits to:\n- Faris Krivic\n- Okan Kurtulus\n- Aldin Visnjic\n- Bug Shankar\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Email us at [hello@octobercms.com](mailto:hello@octobercms.com)\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" : "Packagist",
      "name" : "october/system"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.0.0"
      }, {
        "fixed" : "3.5.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/octobercms/october/security/advisories/GHSA-rvx8-p3xp-fj3p"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-44383"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/octobercms/october/commit/b7eed0bbf54d07ff310fcdc7037a8e8bf1f5043b"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/octobercms/october"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-11-29T21:45:31Z",
    "nvd_published_at" : "2023-11-29T20:15:07Z"
  }
}