CVE-2026-103688: Checkout Files Upload for WooCommerce remote code execution vulnerability
critical 9.8 published 2026-10-28
- Affected versions
- older than 2.4.0
- Fixed in
- 2.4.0
- Latest version
- 2.4.0
- Severity
- Critical · CVSS 9.8
- Active installs
- 7,000+
- Type
- Remote code execution
What an attacker needs
- Access: None. No account or login is needed.
CVSS vector (score by CISA ADP): CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
What to do now
- Update Checkout Files Upload for WooCommerce to 2.4.0 or newer: Dashboard → Updates, or Plugins → “update now”.
- If you cannot update right away, deactivate it until you can.
- Turn on auto-updates for it: Plugins → “Enable auto-updates” on its row.
- Not sure which version you run? Check your version against every known Checkout Files Upload for WooCommerce issue.
With WP-CLI:
wp plugin get checkout-files-upload-woocommerce --field=version. - If you ran an affected version and something looks off (new admin users, spam pages, redirects), run the free scan below.
The advisory
The Checkout Files Upload for WooCommerce WordPress plugin before 2.4.0 does not validate uploaded file types when its accepted file types setting is left empty, which it documents as the way to accept all files, allowing unauthenticated users to upload arbitrary files, including PHP files that lead to remote code execution on servers that execute PHP from the uploads directory.
References
- NVD CVE-2026-103688 nvd.nist.gov
- WPScan advisory wpscan.com
Related
Ran an affected version? Check your site for signs of a hack
The free scan reads the public side of your site and looks for spam pages, hidden redirects, injected scripts and blacklist entries. No login, no install, about a minute.
Where this data comes from
- CVE record, score and references: NIST National Vulnerability Database (NVD), checked 2026-11-04. This product uses data from the NVD API but is not endorsed or certified by the NVD.
- Versions and install counts: wordpress.org/plugins/checkout-files-upload-woocommerce (Plugins API), fetched 2026-11-04.
- The summary, “what an attacker needs” and “what to do” sections are our plain-English reading of the record and the plugin's release history; the quoted description is the record's own text. Spot an error? Email Daniel.