CVE-2023-43876: Withdrawn Advisory Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-2g8p-j2r6-vqpj
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CVSS 5.4
CWE-79
Published
Advisory Summary

CVE-2023-43876 is a MODERATE (CVSS 5.4) cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting Withdrawn Advisory libraries in the Packagist ecosystem. The issue involves october cross-site scripting vulnerability. Remediation is available in the latest vendor maintenance releases.

CVE-2023-43876 at a Glance

CVE Identifier CVE-2023-43876
GHSA Identifier GHSA-2g8p-j2r6-vqpj
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Affected Product Withdrawn Advisory
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-2023-43876

To remediate this vulnerability, upgrade all affected Withdrawn Advisory dependencies to a patched release.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/cms fixed: Latest secure release 
Upgrade october/cms 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 october/cms

How to Check if You Are Affected

To determine whether your application is affected by CVE-2023-43876, inspect your project dependencies for Withdrawn Advisory:

inspect dependencies for october/cms

Analyze the terminal output to locate any version of Withdrawn Advisory in your dependency tree.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 Withdrawn Advisory, 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

## Withdrawn Advisory This advisory has been withdrawn because the vulnerability affects October CMS's installer, not October CMS. The installer deletes all folders and files upon completion of installation. The vulnerability is valid, but because October's installer is not part of one of the GitHub Advisory Database's [supported ecosystems](https://github.com/github/advisory-database/blob/main/README.md#supported-ecosystems), alerts cannot be sent out for the correct package. ## Corrected Description A Cross-Site Scripting (XSS) vulnerability in the installer of October CMS allows an attacker to execute arbitrary web scripts via a crafted payload injected into the dbhost field.

CVE-2023-43876 Affected Withdrawn Advisory Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
october/cms
 Packagist
≤ 3.4.16

References

NVD — CVE-2023-43876 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-43876
Withdrawn Advisory Source Repository REPOSITORY
https://github.com/sromanhu/CVE-2023-43876-October-CMS-Reflected-XSS---Installation/issues/1
Security Fix Commit FIX COMMIT
https://github.com/octobercms/install/commit/ef1225b5596b7c2eb5ca3aa700a23e9f8acf387b
Withdrawn Advisory Source Repository REPOSITORY
https://github.com/octobercms/install
Withdrawn Advisory Source Repository REPOSITORY
https://github.com/sromanhu/October-CMS-Reflected-XSS---Installation/blob/main/README.md

Frequently Asked Questions

What is CVE-2023-43876?
CVE-2023-43876 is a security vulnerability in Withdrawn Advisory involving October Cross-site Scripting vulnerability under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which Withdrawn Advisory versions are affected?
Affected versions include releases prior to current release patches across affected packages: october/cms.
What version fixes CVE-2023-43876?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is october/cms affected?
Yes, october/cms 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-2023-43876?
CVE-2023-43876 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-2023-43876?
CVE-2023-43876 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-2023-43876?
Run the dependency tree command: 'inspect dependencies for october/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-2g8p-j2r6-vqpj",
  "modified" : "2023-10-05T17:32:33Z",
  "published" : "2023-09-28T15:30:17Z",
  "withdrawn" : "2023-10-05T17:32:33Z",
  "aliases" : [ "CVE-2023-43876" ],
  "summary" : "Withdrawn Advisory: October Cross-site Scripting vulnerability",
  "details" : "## Withdrawn Advisory\nThis advisory has been withdrawn because the vulnerability affects October CMS's installer, not October CMS. The installer deletes all folders and files upon completion of installation. The vulnerability is valid, but because October's installer is not part of one of the GitHub Advisory Database's [supported ecosystems](https://github.com/github/advisory-database/blob/main/README.md#supported-ecosystems), alerts cannot be sent out for the correct package.\n\n## Corrected Description\nA Cross-Site Scripting (XSS) vulnerability in the installer of October CMS allows an attacker to execute arbitrary web scripts via a crafted payload injected into the dbhost field.",
  "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/cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "3.4.16"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-43876"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/sromanhu/CVE-2023-43876-October-CMS-Reflected-XSS---Installation/issues/1"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/octobercms/install/commit/ef1225b5596b7c2eb5ca3aa700a23e9f8acf387b"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/octobercms/install"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/sromanhu/October-CMS-Reflected-XSS---Installation/blob/main/README.md"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-09-29T20:39:02Z",
    "nvd_published_at" : "2023-09-28T15:15:12Z"
  }
}