CVE-2019-19373

Name: CVE-2019-19373
Creator: NVD / NIST
Published: 2019-12-11T20:15:10.897+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 4.80%

Last modified Jun 17, 2026

CVE-2019-19373 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An issue was discovered in Squiz Matrix CMS 5.5.0 prior to 5.5.0.3, 5.5.1 prior to 5.5.1.8, 5.5.2 prior to 5.5.2.4, and 5.5.3 prior to 5.5.3.3 where a user can trigger arbitrary unserialization of a PHP object from a packages/cms/page_templates/page_remote_content/page_remote_content.inc POST parameter during processing of a Remote Content page type. This unserialization can be used to trigger the inclusion of arbitrary files on the filesystem (local file inclusion), and results in remote code execution.. EPSS estimates a 4.80% chance of exploitation in the next 30 days.

Description

An issue was discovered in Squiz Matrix CMS 5.5.0 prior to 5.5.0.3, 5.5.1 prior to 5.5.1.8, 5.5.2 prior to 5.5.2.4, and 5.5.3 prior to 5.5.3.3 where a user can trigger arbitrary unserialization of a PHP object from a packages/cms/page_templates/page_remote_content/page_remote_content.inc POST parameter during processing of a Remote Content page type. This unserialization can be used to trigger the inclusion of arbitrary files on the filesystem (local file inclusion), and results in remote code execution.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

4.80%

90.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-502

Affected Software

Vendor	Product	Versions
Squiz	Matrix	>= 5.5.0.0, < 5.5.0.3
Squiz	Matrix	>= 5.5.1.0, < 5.5.1.8
Squiz	Matrix	>= 5.5.2.0, < 5.5.2.4
Squiz	Matrix	>= 5.5.3.0, < 5.5.3.3

References

http://packetstormsecurity.com/files/155671/Squiz-Matrix-CMS-5.5.x.x-Code-Execution-Information-Disclosure.htmlExploit, Third Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2019/Dec/34Exploit, Mailing List, Third Party Advisory
https://matrix.squiz.net/releases/5.5/5.5.3.3Release Notes
https://zxsecurity.co.nz/wp-content/uploads/2019/12/ZX%20Security%20Advisory%20-%20Squiz%20Matrix%20CMS%20-%20Multiple%20Vulnerabilities.pdfExploit, Third Party Advisory
http://packetstormsecurity.com/files/155671/Squiz-Matrix-CMS-5.5.x.x-Code-Execution-Information-Disclosure.htmlExploit, Third Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2019/Dec/34Exploit, Mailing List, Third Party Advisory
https://matrix.squiz.net/releases/5.5/5.5.3.3Release Notes
https://zxsecurity.co.nz/wp-content/uploads/2019/12/ZX%20Security%20Advisory%20-%20Squiz%20Matrix%20CMS%20-%20Multiple%20Vulnerabilities.pdfExploit, Third Party Advisory

Timeline

Published: Dec 11, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-19373?

How severe is CVE-2019-19373?

CVE-2019-19373 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 4.80% probability of exploitation in the next 30 days.

How do I fix CVE-2019-19373?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-19373?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST