Responsive Menu 4.0 — 4.0.3 - Authenticated Arbitrary File Upload
CVE-2021-24160Published · Updated Action summary
Affected: 4.0 – <4.0.4Update to 4.0.4 or newer
All remediation steps- Severity
- High8.8
- CVSS
- 8.8CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:LPrivileges required- Low
UI:NUser interaction- None
S:UScope- Unchanged
C:HConfidentiality- High
I:HIntegrity- High
A:HAvailability- High
- Weakness
- CWE-434 Arbitrary File Upload
- Required access
- Unknown
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Responsive Menu – Mobile Menu & Hamburger Menu Builder responsive-menu
- Affected4.0 – < 4.0.4
- Patched in4.0.4
Update to 4.0.4 or newer.
You are affected if you run 4.0 – < 4.0.4. Version 4.0.4 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Responsive Menu – Mobile Menu & Hamburger Menu Builder.
- No admin access? Run a passive check of your site. It reads public files only.
What to do
- Update to version 4.0.4, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Responsive Menu – Mobile Menu & Hamburger Menu Builder to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Chloe Chamberland.
In the Reponsive Menu (free and Pro) WordPress plugins before 4.0.4, subscribers could upload zip archives containing malicious PHP files that would get extracted to the /rmp-menu/ directory. These files could then be accessed via the front end of the site to trigger remote code execution and ultimately allow an attacker to execute commands to further infect a WordPress site.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Responsive Menu – Mobile Menu & Hamburger Menu Builder
All 5| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium6.3 | Missing Authorization Checks <4.1.8Update to 4.1.8 | CVE-2022-25602 | |
| High8.8 | Cross-Site Request Forgery to Setting Modification <4.0.4Update to 4.0.4 | CVE-2021-24162 | |
| High8.8 | Cross-Site Request Forgery to Arbitrary File Upload <4.0.4Update to 4.0.4 | CVE-2021-24161 | |
| High8.8 | Cross-Site Request Forgery <3.1.4Update to 3.1.4 | CVE-2017-18513 |
- Medium6.3Missing Authorization Checks
<4.1.8Update to 4.1.8
- High8.8Cross-Site Request Forgery to Setting Modification
<4.0.4Update to 4.0.4
- High8.8Cross-Site Request Forgery to Arbitrary File Upload
<4.0.4Update to 4.0.4
- High8.8Cross-Site Request Forgery
<3.1.4Update to 3.1.4
Same weakness (Arbitrary File Upload)
All Arbitrary File Upload| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header | CVE-2026-120688 | |
| Critical9.8 | Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission | CVE-2026-125055 | |
| Critical9.8 | Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter | CVE-2026-119077 | |
| Medium5.3 | Unauthenticated Sensitive Information Exposure in 'search' Parameter | CVE-2026-121518 |
- High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup
≤5.25.25Update to 5.26.45
- Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder
≤1.0.2Update to 1.1
- Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System
≤3.3.9Update to 3.4.0
- Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce
≤5.127.0Update to 5.128.0
Timeline
CVE published
Severity high, CVSS 8.8
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.