CVE-2019-19634

class.upload.php in verot.net omits .pht from the set of dangerous file extensions

9.8 CriticalPublic exploit

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

4.19%Up 0.6 points since Apr 14, 2021

What each source reports

NVD Score used 9.8

Record: CVE-2019-19634
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-434
Updated: 2026-11-02

CVE List No score

Record: CVE-2019-19634
Updated: 2026-11-02

EUVDEUVD-2020-0285 No score

Record: EUVD-2020-0285
Updated: 2026-11-03

GitHub AdvisoriesGHSA-2gc7-w4hw-rr2m 9.8

class.upload.php in verot.net omits .pht from the set of dangerous file extensions

Record: GHSA-2gc7-w4hw-rr2m
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-434
Updated: 2026-11-02

OSV 9.8

Record: CVE-2019-19634
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVGHSA-2gc7-w4hw-rr2m 9.8

class.upload.php in verot.net omits .pht from the set of dangerous file extensions

Record: GHSA-2gc7-w4hw-rr2m
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-434
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`verot/class.upload.php` Packagist	through 1.0.3	None known
`verot/class.upload.php` Packagist	2.0.0 to 2.0.4	None known
`verot/class.upload.php` Packagist	through 1.0.3, plus listed versions 1.0.01.0.11.0.2	None known
`verot/class.upload.php` Packagist	2.0.0 to 2.0.4, plus listed versions 2.0.12.0.22.0.3	None known

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	jra89/CVE-2019-19634	2019-12-08

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-19634 is a critical vulnerability (CVSS 9.8) in Joomlaworks K2, published December 17, 2019. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 4.19%, the 90th percentile. No source names a fixed version.