CVE-2021-34257: Wpanel/wpanel4 cms Unrestricted Upload Of File With Vulnerability

HIGH
Advisory Identifier: GHSA-vhgr-gfx3-fg37
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CVSS 8.8
CWE-434
Published
Advisory Summary

CVE-2021-34257 is a HIGH (CVSS 8.8) unrestricted upload of file with vulnerability (CWE-434: Unrestricted Upload of File with Dangerous Type) affecting Wpanel/wpanel4 cms libraries in the Packagist ecosystem. The issue involves unrestricted upload of file with dangerous type in wpanel 4. Remediation is available in the latest vendor maintenance releases.

CVE-2021-34257 at a Glance

CVE Identifier CVE-2021-34257
GHSA Identifier GHSA-vhgr-gfx3-fg37
Severity HIGH
CVSS v3.1 Base Score 8.8
CWE Classification CWE-434: Unrestricted Upload of File with Dangerous Type
Affected Product Wpanel/wpanel4 cms
Package Ecosystem Packagist
Published Date
Last Updated

Security Impact

CVSS: 8.8

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:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
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-2021-34257

To remediate this vulnerability, upgrade all affected Wpanel/wpanel4 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.

wpanel/wpanel4-cms fixed: Latest secure release 
Upgrade wpanel/wpanel4-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 wpanel/wpanel4-cms

How to Check if You Are Affected

To determine whether your application is affected by CVE-2021-34257, inspect your project dependencies for Wpanel/wpanel4 cms:

inspect dependencies for wpanel/wpanel4-cms

Analyze the terminal output to locate any version of Wpanel/wpanel4 cms 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 Wpanel/wpanel4 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

Multiple Remote Code Execution (RCE) vulnerabilities exist in WPanel 4 4.3.1 and below via a malicious PHP file upload to (1) Dashboard's Avatar image, (2) Posts Folder image, (3) Pages Folder image and (4) Gallery Folder image.

CVE-2021-34257 Affected Wpanel/wpanel4 cms Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
wpanel/wpanel4-cms
 Packagist
≤ 4.3.1

References

NVD — CVE-2021-34257 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-34257
Wpanel/wpanel4 cms Source Repository REPOSITORY
https://github.com/Sentinal920/WPanel4-Authenticated-RCE
Wpanel/wpanel4 cms Source Repository REPOSITORY
https://github.com/wpanel/wpanel4-cms
latestpcsolution.wordpress.com/2021/06/05/wpanel4-... WEB
https://latestpcsolution.wordpress.com/2021/06/05/wpanel4-cms-authenticated-rce

Frequently Asked Questions

What is CVE-2021-34257?
CVE-2021-34257 is a security vulnerability in Wpanel/wpanel4 cms involving Unrestricted Upload of File with Dangerous Type in WPanel 4 under CWE-434: Unrestricted Upload of File with Dangerous Type.
Which Wpanel/wpanel4 cms versions are affected?
Affected versions include releases prior to current release patches across affected packages: wpanel/wpanel4-cms.
What version fixes CVE-2021-34257?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is wpanel/wpanel4-cms affected?
Yes, wpanel/wpanel4-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-2021-34257?
CVE-2021-34257 has a CVSS v3.1 base score of 8.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2021-34257?
CVE-2021-34257 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-2021-34257?
Run the dependency tree command: 'inspect dependencies for wpanel/wpanel4-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-vhgr-gfx3-fg37",
  "modified" : "2022-04-12T20:35:52Z",
  "published" : "2022-04-01T00:00:41Z",
  "aliases" : [ "CVE-2021-34257" ],
  "summary" : "Unrestricted Upload of File with Dangerous Type in WPanel 4",
  "details" : "Multiple Remote Code Execution (RCE) vulnerabilities exist in WPanel 4 4.3.1 and below via a malicious PHP file upload to (1) Dashboard's Avatar image, (2) Posts Folder image, (3) Pages Folder image and (4) Gallery Folder image.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "wpanel/wpanel4-cms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "4.3.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-34257"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Sentinal920/WPanel4-Authenticated-RCE"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/wpanel/wpanel4-cms"
  }, {
    "type" : "WEB",
    "url" : "https://latestpcsolution.wordpress.com/2021/06/05/wpanel4-cms-authenticated-rce"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-434" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-04-12T20:35:52Z",
    "nvd_published_at" : "2022-03-31T16:15:00Z"
  }
}