Skip to main content

Mw Wp Form CVE-2023-28409

CRITICAL
Unrestricted Upload of File with Dangerous Type (CWE-434)
2023-05-23 vultures@jpcert.or.jp
9.8
CVSS 3.1 · NVD
View

Vulnerability Assessment

Weakness
CWE
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.

Impact

CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.

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.
No patch listed yet 1.2% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAI

Unrestricted upload of file with dangerous type exists in MW WP Form versions v4.4.2 and earlier, which may allow a remote unauthenticated attacker to upload an arbitrary file. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. 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

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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. Unrestricted upload of file with dangerous type exists in MW WP Form versions v4.4.2 and earlier, which may allow a remote unauthenticated attacker to upload an arbitrary file. Affected products include: Mw Wp Form Project Mw Wp Form.

Know when Mw Wp Form gets its next vulnerability

  • Watch products and get an email when something new is published
  • Check this CVE against your own stack and servers
  • Exploit and PoC references, threat intelligence from 22 sources

No credit card · 7-day full trial

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

Unrestricted upload of file with dangerous type exists in MW WP Form versions v4.4.2 and earlier, which may allow a remote unauthenticated attacker to upload an arbitrary file.

Threat Intelligence Overview

EPSS Score
1.2%
Top 35% exploitable
Data Quality
2 sources
Confidence: Low

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 No
EPSS 1.2%
Patch available No
Active threat No
Deciding rule
CRITICAL severity
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
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

50
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +49
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

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

Affected Products (CPE)NVD

cpe:2.3:a:mw_wp_form_project:mw_wp_form:*:*:*:*:*:wordpress:*:*
CVE-2023-6316 CRITICAL
9.8 Jan 11

The MW WP Form plugin for WordPress is vulnerable to arbitrary file uploads due to insufficient file type validation in

CVE-2023-28408 CRITICAL
9.8 May 23

Directory traversal vulnerability in MW WP Form versions v4.4.2 and earlier allows a remote unauthenticated attacker to

CVE-2026-78363 MEDIUM POC
4.8 Sep 01

Shortcode injection in MW WP Form WordPress plugin (versions before 5.1.5) allows unauthenticated remote attackers to ex

CVE-2023-6559 HIGH
7.5 Dec 16

The MW WP Form plugin for WordPress is vulnerable to arbitrary file deletion in all versions up to, and including, 5.0.3

CVE-2026-5436 HIGH
8.1 Apr 08

Arbitrary file manipulation in MW WP Form plugin (WordPress) versions ≤5.1.1 allows unauthenticated attackers to move se

CVE-2026-4347 HIGH
8.1 Apr 02

Arbitrary file movement in MW WP Form plugin for WordPress (all versions ≤5.1.0) allows unauthenticated remote attackers

CVE-2026-78364 LOW POC
3.5 Aug 30

Stored XSS in the MW WP Form WordPress plugin (all versions before 5.1.6) lets authenticated users holding the Editor ro

CVE-2026-96567 HIGH
7.2 Oct 02

Stored cross-site scripting in the MW WP Form plugin for WordPress (all versions up to and including 5.1.7) lets an unau

CVE-2026-48871 HIGH
7.1 Jun 15

Reflected or stored Cross-Site Scripting in the MW WP Form WordPress plugin (versions <= 5.1.3) allows remote unauthenti

CVE-2024-24804 MEDIUM
6.5 Feb 10

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in websoudan MW WP Fo

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy