Engineers Online Portal CVE-2023-5277

CRITICAL

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

2023-09-29 cna@vuldb.com

PHP File Upload Engineers Online Portal Engineers Online Portal Project

9.8

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-434 OWASP Top 10:2025 A06:2025 - Insecure Design ASVS 5.0 V5 - File Handling File type validation, storage isolation MITRE ATT&CK 2 techniques across 2 tactics: Command and Control, Persistence The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. Public proof-of-concept exploit code is available.
Exploit ScenarioDerived	A remote attacker could upload malicious files that can be executed on the server by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

Act Now Prioritize within 24-48h. Why: CRITICAL severity + public POC available.

No patch listed yet 0.8% exploitation probability (EPSS)

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AnalysisAI

A vulnerability, which was classified as critical, has been found in SourceCodester Engineers Online Portal 1.0.php. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate file types server-side, store uploads outside webroot, use random filenames, scan for malware.

Affects your stack

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Technical ContextAI · show details

This vulnerability is classified as Unrestricted File Upload (CWE-434), which allows attackers to upload malicious files that can be executed on the server. A vulnerability, which was classified as critical, has been found in SourceCodester Engineers Online Portal 1.0.php. The manipulation of the argument change leads to unrestricted upload. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-240905 was assigned to this vulnerability. Affected products include: Engineers Online Portal Project Engineers Online Portal.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

DescriptionNVD

A vulnerability, which was classified as critical, has been found in SourceCodester Engineers Online Portal 1.0. This issue affects some unknown processing of the file student_avatar.php. The manipulation of the argument change leads to unrestricted upload. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-240905 was assigned to this vulnerability.

Threat Intelligence Overview

EPSS Score

0.8%

Top 47% exploitable

Exploit

POC

Public exploit code exists

Data Quality

4 sources

Confidence: Medium

CVE.org

EPSS

GitHub

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity CRITICAL

CISA KEV No

Public POC Yes

EPSS 0.8%

Patch available No

Active threat No

Deciding rule

CRITICAL severity + public POC available

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

Poc

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact· derived

Medium

Priority Score

70

Low Medium High Critical

KEV: 0

EPSS: +1

CVSS: +49

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Malicious File Upload HIGH

Malicious file upload attacks exploit insufficient validation when web applications accept user-provided files.

Affected Products (CPE)NVD

cpe:2.3:a:engineers_online_portal_project:engineers_online_portal:1.0:*:*:*:*:*:*:*

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References

Advisories & patches

REF https://vuldb.com/?ctiid.240905 REF https://vuldb.com/?id.240905

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