CVE-2019-19576: Verot/class.upload.php Remote Code Execution Vulnerability

CRITICAL
Advisory Identifier: GHSA-r5gm-4p5w-pq2p
Share
CVSS 9.8
CWE-434
Published
Advisory Summary

CVE-2019-19576 is a CRITICAL (CVSS 9.8) remote code execution vulnerability (CWE-434: Unrestricted Upload of File with Dangerous Type) affecting Verot/class.upload.php libraries in the Packagist ecosystem. The issue involves remote code execution in verot/class.upload.php. Remediation is available by upgrading affected packages to version 1.0.3, 2.0.4.

CVE-2019-19576 at a Glance

CVE Identifier CVE-2019-19576
GHSA Identifier GHSA-r5gm-4p5w-pq2p
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-2019-19576

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: 1.0.3 
Upgrade verot/class.upload.php to 1.0.3
verot/class.upload.php fixed: 2.0.4 
Upgrade verot/class.upload.php to 2.0.4
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-2019-19576, 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 1.0.3), 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 before 1.0.3 and 2.x before 2.0.4, as used in the K2 extension for Joomla! and other products, omits .phar from the set of dangerous file extensions.

CVE-2019-19576 Affected Verot/class.upload.php Versions

2 component(s)
Fixed Versions:
1.0.32.0.4
Product / Package Ecosystem Affected Versions Fixed Version
verot/class.upload.php
 Packagist
< 1.0.3
1.0.3
verot/class.upload.php
 Packagist
≥ 2.0.0
< 2.0.4
2.0.4

References

NVD — CVE-2019-19576 NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-19576
Security Fix Commit FIX COMMIT
https://github.com/getk2/k2/commit/d1344706c4b74c2ae7659b286b5a066117155124
Security Fix Commit FIX COMMIT
https://github.com/verot/class.upload.php/commit/5a7505ddec956fdc9e9c071ae5089865559174f1
Security Fix Commit FIX COMMIT
https://github.com/verot/class.upload.php/commit/db1b4fe50c1754696970d8b437f07e7b94a7ebf2
Verot/class.upload.php Source Repository REPOSITORY
https://github.com/jra89/CVE-2019-19576
Verot/class.upload.php Source Repository REPOSITORY
https://github.com/verot/class.upload.php/compare/1.0.2...1.0.3
Verot/class.upload.php Source Repository REPOSITORY
https://github.com/verot/class.upload.php/compare/2.0.3...2.0.4
medium.com/@jra8908/cve-2019-1... WEB
https://medium.com/%40jra8908/cve-2019-19576-e9da712b779
medium.com/@jra8908/cve-2019-1... WEB
https://medium.com/@jra8908/cve-2019-19576-e9da712b779
www.verot.net WEB
https://www.verot.net
www.verot.net/php_class_upload.ht... WEB
https://www.verot.net/php_class_upload.htm
Verot/class.upload.php Security Information SECURITY
http://packetstormsecurity.com/files/155577/Verot-2.0.3-Remote-Code-Execution.html

Frequently Asked Questions

What is CVE-2019-19576?
CVE-2019-19576 is a security vulnerability in Verot/class.upload.php involving Remote code execution in verot/class.upload.php under CWE-434: Unrestricted Upload of File with Dangerous Type.
Which Verot/class.upload.php versions are affected?
Affected versions include releases prior to 1.0.3, 2.0.4 across affected packages: verot/class.upload.php.
What version fixes CVE-2019-19576?
Upgrading to 1.0.3, 2.0.4 (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 1.0.3, 2.0.4. Upgrade your dependency to 1.0.3, 2.0.4 or later.
What is the CVSS score of CVE-2019-19576?
CVE-2019-19576 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-2019-19576?
CVE-2019-19576 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-2019-19576?
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-r5gm-4p5w-pq2p",
  "modified" : "2026-07-21T15:02:49Z",
  "published" : "2020-01-16T22:17:40Z",
  "aliases" : [ "CVE-2019-19576" ],
  "summary" : "Remote code execution in verot/class.upload.php",
  "details" : "class.upload.php in verot.net class.upload before 1.0.3 and 2.x before 2.0.4, as used in the K2 extension for Joomla! and other products, omits .phar from the set of dangerous file extensions.",
  "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"
      }, {
        "fixed" : "1.0.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "verot/class.upload.php"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0.0"
      }, {
        "fixed" : "2.0.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2019-19576"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/getk2/k2/commit/d1344706c4b74c2ae7659b286b5a066117155124"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/verot/class.upload.php/commit/5a7505ddec956fdc9e9c071ae5089865559174f1"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/verot/class.upload.php/commit/db1b4fe50c1754696970d8b437f07e7b94a7ebf2"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/jra89/CVE-2019-19576"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/verot/class.upload.php/compare/1.0.2...1.0.3"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/verot/class.upload.php/compare/2.0.3...2.0.4"
  }, {
    "type" : "WEB",
    "url" : "https://medium.com/%40jra8908/cve-2019-19576-e9da712b779"
  }, {
    "type" : "WEB",
    "url" : "https://medium.com/@jra8908/cve-2019-19576-e9da712b779"
  }, {
    "type" : "WEB",
    "url" : "https://www.verot.net"
  }, {
    "type" : "WEB",
    "url" : "https://www.verot.net/php_class_upload.htm"
  }, {
    "type" : "WEB",
    "url" : "http://packetstormsecurity.com/files/155577/Verot-2.0.3-Remote-Code-Execution.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-434" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-01-16T22:17:24Z",
    "nvd_published_at" : "2019-12-04T18:15:16Z"
  }
}