Checkout Files Upload for WooCommerce: Unauthenticated file upload leading to RCE
Summary
The WordPress plugin Checkout Files Upload for WooCommerce does not validate file types when its accepted file types setting is empty. Unauthenticated attackers can upload arbitrary files, including PHP files. On servers that execute PHP from the uploads directory, this can lead to remote code execution with access to shop and customer data. The CVSS base score is 9.8 according to the provided data, but NVD analysis is still pending.
Affected
- Checkout Files Upload for WooCommerce versions before 2.4.0 (per WPScan)
- Exact lowest affected version: Unknown.
- Vulnerable condition: accepted file types setting left empty.
Fixed in
- Update to version 2.4.0 or later.
Workaround
- Set an explicit allowlist of file types in the plugin settings and verify that PHP uploads are blocked.
- Block PHP execution in the uploads directory at the web server level.
- Deactivate and remove the plugin if neither measure is possible.
Exploitation
- No known exploitation in the wild (Threat Radar).
- Not listed in CISA KEV.
- CISA SSVC: exploitation none, automatable yes, technical impact total.
- Public proof of concept: Unconfirmed.
Our recommendation
- Check whether the plugin is installed and which version is active.
- Update to version 2.4.0 or later as a priority.
- Until the update is applied, set an explicit file type allowlist and block PHP execution in the uploads directory.
- Review the uploads directory for unexpected PHP or other executable files.
- Monitor web server logs for unusual requests to the upload endpoint.
Public exploits
Links to third-party sites, not checked by us – exploit code can contain malware. Only use it in isolated test environments.
- Proof of concept on GitHub (1 repositories)
noxcrypt-x/CVE-2026-103688
Research sources
- WPScan vulnerability record wpscan.com
- VulDB entry vuldb.com
- Threat Radar (OffSeq) radar.offseq.com
- CVE mirror (threatint) cve.threatint.com
- WordPress.org plugin listing tr.wordpress.org
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 30 Oct 2026, 16:17.
Original description (NVD)
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.
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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