What is the CVSS score of CVE-2020-37113?

CVE-2020-37113 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

Which versions of PHP are affected by CVE-2020-37113?

Open Eclass Platform versions 1.7.3 and earlier contain a critical file upload vulnerability that allows attackers to upload and execute malicious files, potentially compromising educational…

Is there a public PoC exploit available for CVE-2020-37113?

Yes, a public proof-of-concept exploit is available for CVE-2020-37113. Prioritise patching immediately. EPSS: 0.2%.

How to fix or mitigate CVE-2020-37113?

Within 24 hours: Inventory all Open Eclass Platform instances and their versions; disable file upload functionality if operationally feasible; implement network access controls restricting upload endpoints. Within 7 days: Deploy Web Application Firewall (WAF) rules to block suspicious file uploads; enforce strict file type validation and storage outside webroot; enable comprehensive logging of upload activities. Within 30 days: Migrate to an unaffected platform version or alternative learning management system; conduct forensic audit for evidence of exploitation; implement file integrity monitoring.

PHP CVE-2020-37113

HIGH

Unrestricted Upload of File with Dangerous Type (CWE-434)

2026-02-03 disclosure@vulncheck.com

PHP RCE Open Eclass Platform

8.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.8 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Feb 12, 2026 - 18:33 vuln.today

Public exploit code

CVE Published

Feb 03, 2026 - 18:16 nvd

HIGH 8.8

DescriptionCVE.org

GUnet OpenEclass 1.7.3 allows authenticated users to bypass file extension restrictions when uploading files. By renaming a PHP file to .php3 or .PhP, an attacker can upload a web shell and execute arbitrary code on the server. This vulnerability enables remote code execution by bypassing the intended file type checks in the exercise submission feature.

AnalysisAI

Open Eclass Platform versions up to 1.7.3 is affected by unrestricted upload of file with dangerous type (CVSS 8.8).

Technical ContextAI

This vulnerability (CWE-434: Unrestricted Upload of File with Dangerous Type) affects Open Eclass Platform. GUnet OpenEclass 1.7.3 allows authenticated users to bypass file extension restrictions when uploading files. By renaming a PHP file to .php3 or .PhP, an attacker can upload a web shell and execute arbitrary code on the server. This vulnerability enables remote code execution by bypassing the intended file type checks in the exercise submission feature.

RemediationAI

Monitor vendor advisories for a patch. Validate file types by content. Store uploads outside web root. Restrict network access to the affected service where possible.