CVE-2023-3187Public exploitNetwork attack vector

Authenticated code execution via double-extension upload

Published Jun 9, 2023 · Updated Aug 2, 2024

Unrestricted file upload in Teachers Record Management System 1.0 allows remote authenticated users to execute server-side code. The changeimage.php profile-picture handler accepts a newpic file named with .php.gif and containing GIF89a bytes plus embedded PHP. A teacher account and a server configuration that processes the inner PHP extension are required for host command execution.

CVSS severity5.4
Medium
EPSS probability2.56%
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 Teachers Record Management System 1.0 allows remote authenticated users to execute server-side code. The changeimage.php profile-picture handler accepts a newpic file named with .php.gif and containing GIF89a bytes plus embedded PHP. A teacher account and a server configuration that processes the inner PHP extension are required for host command execution.

The record

CVE
CVE-2023-3187
Published
Jun 9, 2023
Updated
Aug 2, 2024
Vendor
jaychouchannel
Product
Teachers Record Management System
Classifications
CWE-434, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 9, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record 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=1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

jaychouchannel · Teachers Record Management Systemversion=1.0

Published CVSS scores

6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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
T1190Exploit Public-Facing Application

Public exploit references

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Technologies

Your stack

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Your stack

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