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CVE-2019-19634

34
FAUCET Score

CVE-2019-19634 is a critical file upload vulnerability in verot.net class.upload (versions through 1.0.3 and 2.x through 2.0.4), including its use in the K2 extension for Joomla! and other products. It allows remote attackers to upload malicious files by failing to block .pht extensions, similar to CVE-2019-19576. With a CVSS score of 9.8 (CRITICAL), this vulnerability is easily exploitable over the network without authentication, leading to complete compromise of confidentiality, integrity, and availability. While no public exploit code or active exploitation has been observed, and community discussion is minimal, its high severity and ease of exploitation warrant immediate patching.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.0.3CPE matchmatch criteria
cpe:2.3:a:verot_project:verot:*:*:*:*:*:*:*:*
>= 2.0.0, < 2.0.4CPE matchmatch criteria
cpe:2.3:a:verot_project:verot:*:*:*:*:*:*:*:*
<= 2.10.1CPE matchmatch criteria
cpe:2.3:a:joomlaworks:k2:*:*:*:*:*:joomla\!:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.15%
Probability of exploitation in next 30 days
EPSS Percentile
89.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0415 is in the 83rd percentile among its peer group of 36,821 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Advisories (1)

composerGHSA-2gc7-w4hw-rr2mcritical

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

Feb 28, 2020

References

github.com / jra89/CVE-2019-19634
Third Party Advisory
github.com / verot/class.upload.php/blob/2.0.4/src/class.upload.php
ExploitThird Party Advisory
medium.com / %40jra8908/cve-2019-19634-arbitrary-file-upload-in-class-upload-php-ccaf9e13875e