How severe is CVE-2019-19373?

CVE-2019-19373 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2019-19373 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-19373?

CVE-2019-19373 affects Squiz Matrix. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-19373?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-19373 published?

CVE-2019-19373 was published on 2019-12-11 and last updated on 2026-06-17.

CVE-2019-19373

CVE-2019-19373 is a high-severity vulnerability in Squiz Matrix with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-502.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Squiz Matrix
Published: 2019-12-11
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2019-19373?: 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.
How severe is CVE-2019-19373?: CVE-2019-19373 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2019-19373 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-19373?: CVE-2019-19373 affects Squiz Matrix. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-19373?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-19373 published?: CVE-2019-19373 was published on 2019-12-11 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:squiz:matrix:*:*:*:*:*:*:*:*

More vulnerabilities in Squiz Matrix

CVE-2019-19374 — Critical (CVSS 9.1): An issue was discovered in core/assets/form/form_question_types/form_question_type_file_upload/form_question_type_file_u…
CVE-2017-14198 — High (CVSS 8.8): An issue was discovered in Squiz Matrix before 5.3.6.1 and 5.4.x before 5.4.1.3. Authenticated users with permissions…
CVE-2017-14196 — High (CVSS 7.5): An issue was discovered in Squiz Matrix from 5.3 through to 5.3.6.1 and 5.4.1.3. An information disclosure caused by a…
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CVE-2022-32277 — Medium (CVSS 5.3): Squiz Matrix CMS 6.20 is vulnerable to an Insecure Direct Object Reference caused by failure to correctly validate…

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