How severe is CVE-2019-15751?

CVE-2019-15751 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-15751 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-15751?

CVE-2019-15751 affects Sitos Sitos Six. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-15751?

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

When was CVE-2019-15751 published?

CVE-2019-15751 was published on 2019-10-07 and last updated on 2026-06-17.

CVE-2019-15751

CVE-2019-15751 is a critical-severity vulnerability in Sitos Sitos Six with a CVSS 3.x base score of 9.8. 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 4% (90th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Sitos Sitos Six
Published: 2019-10-07
Last modified: 2026-06-17

Description

An unrestricted file upload vulnerability in SITOS six Build v6.2.1 allows remote attackers to execute arbitrary code by uploading a SCORM file with an executable extension. This allows an unauthenticated attacker to upload a malicious file (containing PHP code to execute operating system commands) to the web root of the application.

Frequently asked questions

What is CVE-2019-15751?: An unrestricted file upload vulnerability in SITOS six Build v6.2.1 allows remote attackers to execute arbitrary code by uploading a SCORM file with an executable extension. This allows an unauthenticated attacker to upload a malicious file (containing PHP code to execute operating system commands) to the web root of the application.
How severe is CVE-2019-15751?: CVE-2019-15751 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-15751 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-15751?: CVE-2019-15751 affects Sitos Sitos Six. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-15751?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2019-15751 published?: CVE-2019-15751 was published on 2019-10-07 and last updated on 2026-06-17.

References

https://www.contextis.com/en/resources/advisories/cve-2019-15751

Affected products (1)

cpe:2.3:a:sitos:sitos_six:6.2.1:*:*:*:*:*:*:*

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