HOMEVULNERABILITIESCVE-2020-23828
CRITICAL

CVE-2020-23828

CWE-434Published: September 15, 2020· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2020-23828 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

online_course_registration_project1 product(s)
online course registration
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://www.exploit-db.com/exploits/48704
ADVISORYhttps://www.sourcecodester.com/php/14251/online-course-registration.html
ADVISORYhttps://www.exploit-db.com/exploits/48704
ADVISORYhttps://www.sourcecodester.com/php/14251/online-course-registration.html

All References (4)

→
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

Quick Facts

CVE IDCVE-2020-23828
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-434
CISA KEVNo
Affected1 vendor(s)
PublishedSep 15, 2020

Related CVEs (CWE-434)

CVE-2024-49216
10.0
CVE-2025-39380
10.0
CVE-2019-10959
10.0
CVE-2022-40981
10.0
CVE-2026-61900
10.0
CVE-2025-47637
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-23828 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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