CVE-2019-19576K2 Unrestricted File Upload
Remote code execution in verot/class.upload.php
Published Jan 16, 2020 · Updated Jul 21, 2026 · Also known as GHSA-r5gm-4p5w-pq2p
Key Facts
Patch immediately- CVE-2019-19576 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting K2 (Getk2), Verot (Verot Project), verot/class.upload.php (composer).
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 26% probability of exploitation in the next 30 days.
- Fixed versions are available, including K2 <=2.10.1, joomlaworks k2 2.10.1, Verot 1.0.3.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Scores
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
26%
Higher than 97.9% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
52/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
3
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Advisories And Exploit References
- advisoryhttps://medium.com/@jra8908/cve-2019-19576-e9da712b779
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2019-19576
- advisoryGHSA advisory
- advisoryhttps://www.verot.net/php_class_upload.htm
- patchhttps://github.com/getk2/k2/commit/d1344706c4b74c2ae7659b286b5a066117155124
- patchhttps://github.com/verot/class.upload.php/commit/5a7505ddec956fdc9e9c071ae5089865559174f1
Description
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.
Affected Products
4 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| K2Getk2 | See advisory | 2.10.1 |
| VerotVerot Project | See advisory | 1.0.3 |
| verot/class.upload.phpcomposer | >= 2.0.0 | 2.0.4 |
Patched Releases
K2
<=2.10.1
joomlaworks k2
2.10.1
Verot
1.0.3, 2.0.4
verot/class.upload.php
1.0.3, 2.0.4
Timeline
Publicly disclosed
Jan 16, 2020
Last updated
Jul 21, 2026
Weakness Type
- CWE-434 Unrestricted Upload of File with Dangerous Type
References
- advisorymedium.com · CVE-2019-19576
- advisorynvd.nist.gov · CVE-2019-19576
- advisoryGHSA advisory
- advisoryverot.net · php_class_upload.htm
- patchgithub.com · d134470
FAQ
Common Questions.
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!
Affected: K2 (Getk2); Verot (Verot Project); verot/class.upload.php (composer) versions >= 2.0.0. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including K2 <=2.10.1, joomlaworks k2 2.10.1, Verot 1.0.3.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Is CVE-2019-19576 On Your Attack Surface?
Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.
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