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WooCommerce Follow-Up Emails <= 4.9.40 — Authenticated Arbitrary File Upload in Template Editing

CVE-2023-33318Published · Updated

Action summary

Affected: ≤4.9.40Update to 4.9.50 or newer

All remediation steps
Watch plugin
Severity
Critical9.9
CVSS
9.9
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:L Privileges required
Low
UI:N User interaction
None
S:C Scope
Changed
C:H Confidentiality
High
I:H Integrity
High
A:H Availability
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?

Woocommerce Follow-ups woocommerce-follow-up-emails

  1. Affected≤ 4.9.40
  2. Patched in4.9.50

Update to 4.9.50 or newer.

You are affected if you run ≤ 4.9.40. Version 4.9.50 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Woocommerce Follow-ups.
  • No admin access? Run a passive check of your site. It reads public files only.

What to do

  1. Update to version 4.9.50, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Woocommerce Follow-ups to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to Rafie Muhammad.

The WooCommerce Follow-Up Emails plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the template editing functionality in versions up to, and including, 4.9.40. This makes it possible for authenticated attackers, with Follow-Up Emails Manager permissions and above, to upload arbitrary files on the affected site's server which may make remote code execution possible.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Woocommerce Follow-ups

All 4
More vulnerabilities in Woocommerce Follow-ups
SeverityVulnerabilityCVEPublished
High7.2Authenticated (Follow-up emails manager+) SQL Injection
≤4.9.50Update to 4.9.51
CVE-2023-33330
Medium6.1Reflected Cross-Site Scripting
≤4.9.40Update to 4.9.50
CVE-2023-33319
Medium4.3Cross-Site Request Forgery
≤4.9.40Update to 4.9.50
CVE-2023-33316

Same weakness (Arbitrary File Upload)

All Arbitrary File Upload
Other Arbitrary File Upload vulnerabilities
SeverityVulnerabilityCVEPublished
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
CVE-2026-120688
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
CVE-2026-125055
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
CVE-2026-119077
Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce≤5.127.0Update to 5.128.0
CVE-2026-121518

Timeline

  1. CVE published

    Severity critical, CVSS 9.9

  2. 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.

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