CVE-2021-27817: Shopxo/shopxo Remote Code Execution Vulnerability

CRITICAL
Advisory Identifier: GHSA-xx77-w6p5-xvmj
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CVSS 9.8
CWE-434
Published
Advisory Summary

CVE-2021-27817 is a CRITICAL (CVSS 9.8) remote code execution vulnerability (CWE-434: Unrestricted Upload of File with Dangerous Type) affecting Shopxo/shopxo libraries in the Packagist ecosystem. The issue involves shopxo rce vulnerability. Remediation is available in the latest vendor maintenance releases.

CVE-2021-27817 at a Glance

CVE Identifier CVE-2021-27817
GHSA Identifier GHSA-xx77-w6p5-xvmj
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-434: Unrestricted Upload of File with Dangerous Type
Affected Product Shopxo/shopxo
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 9.8

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2021-27817

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

shopxo/shopxo fixed: Latest secure release 
Upgrade shopxo/shopxo 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 shopxo/shopxo

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-27817, inspect your project dependencies for Shopxo/shopxo:

inspect dependencies for shopxo/shopxo

Analyze the terminal output to locate any version of Shopxo/shopxo 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-434: Unrestricted Upload of File with Dangerous Type, where the product allows the upload or transfer of dangerous file types that are automatically processed within its environment. In Shopxo/shopxo, 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

A remote command execution vulnerability in shopxo 1.9.3 allows an attacker to upload malicious code generated by phar where the suffix is JPG, which is uploaded after modifying the phar suffix.

CVE-2021-27817 Affected Shopxo/shopxo Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
shopxo/shopxo
 Packagist
≤ 1.9.3

References

NVD — CVE-2021-27817 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-27817
Shopxo/shopxo Source Repository REPOSITORY
https://github.com/h4ckdepy/vuls/blob/main/shopxo.md

Frequently Asked Questions

What is CVE-2021-27817?
CVE-2021-27817 is a security vulnerability in Shopxo/shopxo involving ShopXO RCE Vulnerability under CWE-434: Unrestricted Upload of File with Dangerous Type.
Which Shopxo/shopxo versions are affected?
Affected versions include releases prior to current release patches across affected packages: shopxo/shopxo.
What version fixes CVE-2021-27817?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is shopxo/shopxo affected?
Yes, shopxo/shopxo 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-2021-27817?
CVE-2021-27817 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2021-27817?
CVE-2021-27817 is classified under CWE-434: Unrestricted Upload of File with Dangerous Type (The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.).
How can I check Packagist dependencies for CVE-2021-27817?
Run the dependency tree command: 'inspect dependencies for shopxo/shopxo'. 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-xx77-w6p5-xvmj",
  "modified" : "2023-07-13T17:04:14Z",
  "published" : "2022-05-24T17:44:35Z",
  "aliases" : [ "CVE-2021-27817" ],
  "summary" : "ShopXO RCE Vulnerability",
  "details" : "A remote command execution vulnerability in shopxo 1.9.3 allows an attacker to upload malicious code generated by phar where the suffix is JPG, which is uploaded after modifying the phar suffix.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "shopxo/shopxo"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.9.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-27817"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/h4ckdepy/vuls/blob/main/shopxo.md"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-434" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-07-13T17:04:14Z",
    "nvd_published_at" : "2021-03-15T17:15:00Z"
  }
}