CVE-2020-6143

Name: CVE-2020-6143
Creator: NVD / NIST
Published: 2020-09-01T21:15:13.083+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 6.17%

Last modified Jun 17, 2026

CVE-2020-6143 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A remote code execution vulnerability exists in the install functionality of OS4Ed openSIS 7.4. The password variable which is set at line 122 in install/Step5.php allows for injection of PHP code into the Data.php file that it writes. EPSS estimates a 6.17% chance of exploitation in the next 30 days.

Description

A remote code execution vulnerability exists in the install functionality of OS4Ed openSIS 7.4. The password variable which is set at line 122 in install/Step5.php allows for injection of PHP code into the Data.php file that it writes. An attacker can send an HTTP request to trigger this vulnerability.

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

6.17%

92.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Os4ed	Opensis	7.4

References

https://talosintelligence.com/vulnerability_reports/TALOS-2020-1083Exploit, Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2020-1083Exploit, Third Party Advisory

Timeline

Published: Sep 1, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-6143?

How severe is CVE-2020-6143?

CVE-2020-6143 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 6.17% probability of exploitation in the next 30 days.

How do I fix CVE-2020-6143?

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-2020-6143?

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

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Source: NVD / NIST