Frontend File Manager <= 18.2 — Privilege Escalation
CVE-2021-4344Published · Updated Action summary
Affected: <18.3Update to 18.3 or newer
All remediation steps- Severity
- Medium6.4
- CVSS
- 6.4CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:LPrivileges required- Low
UI:NUser interaction- None
S:CScope- Changed
C:LConfidentiality- Low
I:LIntegrity- Low
A:NAvailability- None
- Weakness
- CWE-285 Improper Authorization
- Required access
- Unknown
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Frontend File Manager Plugin nmedia-user-file-uploader
- Affected< 18.3
- Patched in18.3
Update to 18.3 or newer.
You are affected if you run < 18.3. Version 18.3 and later are not affected by this issue.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Frontend File Manager Plugin.
- No admin access? Run a passive check of your site. It reads public files only.
What to do
- Update to version 18.3, or a newer patched version
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Frontend File Manager Plugin to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Jerome Bruandet.
The Frontend File Manager plugin for WordPress is vulnerable to Privilege Escalation in versions up to, and including, 18.2. This is due to lacking mishandling the use of user IDs that is accessible by the visitor. This makes it possible for unauthenticated or authenticated attackers to access the information and privileges of other users, including 'guest users', in their own category (authenticated, or unauthenticated guests).
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 Frontend File Manager Plugin
All 34| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting ≤23.6No patch available | CVE-2026-32577 | |
| Critical9.1 | Unauthenticated Arbitrary File Deletion ≤23.6No patch available | CVE-2026-12277 | |
| Medium4.3 | Cross-Site Request Forgery ≤23.6No patch available | CVE-2026-16292 | |
| High8.1 | Authenticated (Subscriber+) Arbitrary File Deletion ≤23.6No patch available | CVE-2026-8095 | |
| Medium6.4 | Authenticated (Subscriber+) Stored Cross-Site Scripting ≤23.6No patch available | CVE-2026-8378 |
- High7.2Unauthenticated Stored Cross-Site Scripting
≤23.6No patch available
- Critical9.1Unauthenticated Arbitrary File Deletion
≤23.6No patch available
- Medium4.3Cross-Site Request Forgery
≤23.6No patch available
- High8.1Authenticated (Subscriber+) Arbitrary File Deletion
≤23.6No patch available
- Medium6.4Authenticated (Subscriber+) Stored Cross-Site Scripting
≤23.6No patch available
Timeline
CVE published
Severity medium, CVSS 6.4
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- [object Object]. 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.