CVE-2019-15751

Name: CVE-2019-15751
Creator: NVD / NIST
Published: 2019-10-07T12:15:11.603+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 4.47%

Last modified Jun 17, 2026

CVE-2019-15751 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 4.47% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

4.47%

90.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-434

Affected Software

Vendor	Product	Versions
Sitos	Sitos Six	6.2.1

References

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

Timeline

Published: Oct 7, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-15751?

How severe is CVE-2019-15751?

CVE-2019-15751 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 4.47% probability of exploitation in the next 30 days.

How do I fix CVE-2019-15751?

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-2019-15751?

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

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Source: NVD / NIST