CVE-2019-19634: Verot/class.upload.php Class.upload.php Vulnerability

CRITICAL
Advisory Identifier: GHSA-2gc7-w4hw-rr2m
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CVSS 9.8
CWE-434
Published
Advisory Summary

CVE-2019-19634 is a CRITICAL (CVSS 9.8) class.upload.php vulnerability (CWE-434: Unrestricted Upload of File with Dangerous Type) affecting Verot/class.upload.php libraries in the Packagist ecosystem. The issue involves class.upload.php in verot.net omits .pht from the set of dangerous file extensions. Remediation is available in the latest vendor maintenance releases.

CVE-2019-19634 at a Glance

CVE Identifier CVE-2019-19634
GHSA Identifier GHSA-2gc7-w4hw-rr2m
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-434: Unrestricted Upload of File with Dangerous Type
Affected Product Verot/class.upload.php
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-2019-19634

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

verot/class.upload.php fixed: Latest secure release 
Upgrade verot/class.upload.php to Latest secure release
verot/class.upload.php fixed: Latest secure release 
Upgrade verot/class.upload.php 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 verot/class.upload.php

How to Check if You Are Affected

To determine whether your application is affected by CVE-2019-19634, inspect your project dependencies for Verot/class.upload.php:

inspect dependencies for verot/class.upload.php

Analyze the terminal output to locate any version of Verot/class.upload.php 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 Verot/class.upload.php, 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

class.upload.php in verot.net class.upload through 1.0.3 and 2.x through 2.0.4, as used in the K2 extension for Joomla! and other products, omits .pht from the set of dangerous file extensions, a similar issue to CVE-2019-19576.

CVE-2019-19634 Affected Verot/class.upload.php Versions

2 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
verot/class.upload.php
 Packagist
≤ 1.0.3
verot/class.upload.php
 Packagist
≥ 2.0.0
≤ 2.0.4

References

NVD — CVE-2019-19634 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-19634
Verot/class.upload.php Source Repository REPOSITORY
https://github.com/jra89/CVE-2019-19634
Verot/class.upload.php Source Repository REPOSITORY
https://github.com/verot/class.upload.php/blob/2.0.4/src/class.upload.php#L3068
medium.com/@jra8908/cve-2019-1... WEB
https://medium.com/%40jra8908/cve-2019-19634-arbitrary-file-upload-in-class-upload-php-ccaf9e13875e
medium.com/@jra8908/cve-2019-1... WEB
https://medium.com/@jra8908/cve-2019-19634-arbitrary-file-upload-in-class-upload-php-ccaf9e13875e

Frequently Asked Questions

What is CVE-2019-19634?
CVE-2019-19634 is a security vulnerability in Verot/class.upload.php involving class.upload.php in verot.net omits .pht from the set of dangerous file extensions under CWE-434: Unrestricted Upload of File with Dangerous Type.
Which Verot/class.upload.php versions are affected?
Affected versions include releases prior to current release patches across affected packages: verot/class.upload.php.
What version fixes CVE-2019-19634?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is verot/class.upload.php affected?
Yes, verot/class.upload.php 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-2019-19634?
CVE-2019-19634 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-2019-19634?
CVE-2019-19634 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-2019-19634?
Run the dependency tree command: 'inspect dependencies for verot/class.upload.php'. 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-2gc7-w4hw-rr2m",
  "modified" : "2026-07-21T15:02:53Z",
  "published" : "2020-02-28T01:10:17Z",
  "aliases" : [ "CVE-2019-19634" ],
  "summary" : "class.upload.php in verot.net omits .pht from the set of dangerous file extensions",
  "details" : "class.upload.php in verot.net class.upload through 1.0.3 and 2.x through 2.0.4, as used in the K2 extension for Joomla! and other products, omits .pht from the set of dangerous file extensions, a similar issue to CVE-2019-19576.",
  "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" : "verot/class.upload.php"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.0.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "verot/class.upload.php"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0.0"
      }, {
        "last_affected" : "2.0.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-19634"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jra89/CVE-2019-19634"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/verot/class.upload.php/blob/2.0.4/src/class.upload.php#L3068"
  }, {
    "type" : "WEB",
    "url" : "https://medium.com/%40jra8908/cve-2019-19634-arbitrary-file-upload-in-class-upload-php-ccaf9e13875e"
  }, {
    "type" : "WEB",
    "url" : "https://medium.com/@jra8908/cve-2019-19634-arbitrary-file-upload-in-class-upload-php-ccaf9e13875e"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-434" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-02-25T16:03:36Z",
    "nvd_published_at" : "2019-12-17T18:15:14Z"
  }
}