CVE-2026-5670Public exploitNetwork attack vector

Authenticated code execution via unrestricted PHP upload

Published Apr 6, 2026 · Updated Apr 6, 2026

Unrestricted file upload in Cyber-III Student Management System allows remote authenticated users to execute arbitrary PHP code. AssignmentSection/submission/upload.php passes the basename of the client-supplied filename to move_uploaded_file without checking its extension or MIME type, placing it in a web-accessible uploads directory. A valid student session is required; requesting the planted PHP file executes it with the web server's privileges.

CVSS severity6.3
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Cyber-III Student Management System allows remote authenticated users to execute arbitrary PHP code. AssignmentSection/submission/upload.php passes the basename of the client-supplied filename to move_uploaded_file without checking its extension or MIME type, placing it in a web-accessible uploads directory. A valid student session is required; requesting the planted PHP file executes it with the web server's privileges.

The record

CVE
CVE-2026-5670
Published
Apr 6, 2026
Updated
Apr 6, 2026
Vendor
Cyber-III
Product
Student Management System
Classifications
CWE-434, CWE-284, T1505.003, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=1a938fa61e9f735078e9b291d2e6215b4942af3f

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Cyber-III · Student Management Systemversion=1a938fa61e9f735078e9b291d2e6215b4942af3f

Published CVSS scores

6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
CWE-284Improper Access Control
T1505.003Web Shell
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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