CVE-2020-23828

Name: CVE-2020-23828
Creator: NVD / NIST
Published: 2020-09-15T22:15:13.317+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 4.11%

Last modified Jun 17, 2026

CVE-2020-23828 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A File Upload vulnerability in SourceCodester Online Course Registration v1.0 allows remote attackers to achieve Remote Code Execution (RCE) on the hosting webserver by uploading a crafted PHP web-shell that bypasses the image upload filters. An attack uses /Online%20Course%20Registration/my-profile.php with the POST parameter photo.. EPSS estimates a 4.11% chance of exploitation in the next 30 days.

Description

A File Upload vulnerability in SourceCodester Online Course Registration v1.0 allows remote attackers to achieve Remote Code Execution (RCE) on the hosting webserver by uploading a crafted PHP web-shell that bypasses the image upload filters. An attack uses /Online%20Course%20Registration/my-profile.php with the POST parameter photo.

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

4.11%

89.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-434

Affected Software

Vendor	Product	Versions
Online Course Registration Project	Online Course Registration	1.0

References

https://www.exploit-db.com/exploits/48704Exploit, Third Party Advisory, VDB Entry
https://www.sourcecodester.com/php/14251/online-course-registration.htmlExploit, Vendor Advisory
https://www.exploit-db.com/exploits/48704Exploit, Third Party Advisory, VDB Entry
https://www.sourcecodester.com/php/14251/online-course-registration.htmlExploit, Vendor Advisory

Timeline

Published: Sep 15, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-23828?

How severe is CVE-2020-23828?

CVE-2020-23828 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 4.11% probability of exploitation in the next 30 days.

How do I fix CVE-2020-23828?

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-2020-23828?

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

Scan your code now

Source: NVD / NIST