CVE-2026-103688Checkout Files Upload for WooCommerce Unrestricted File Upload
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,…
Published Oct 28, 2026 · Updated Oct 28, 2026 · Also known as 15f23748-fc32-4ea1-bd23-7b13ec1409af, EUVD-2026-111699, GHSA-h6g6-j3rf-hcqm, WORDFENCE-15f23748-fc32-4ea1-bd23-7b13ec1409af
Key Facts
Patch immediately- CVE-2026-103688 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting checkout-files-upload-woocommerce (wordpress-plugin), Checkout Files Upload for WooCommerce.
- It is exploited in the wild, listed in Industry KEV feed since Oct 28, 2026. No public exploit code is known.
- EPSS estimates a 0.6% probability of exploitation in the next 30 days.
- Fixed versions are available, including Checkout Files Upload for WooCommerce 2.4.0, checkout-files-upload-woocommerce 2.4.0.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
0.6%
Higher than 49.2% of all scored CVEs
Exploit maturity
Exploited (KEV)
ATLAS score
60/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Oct 28, 2026
0 days after publication
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Exploited (KEV)
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
1
Reports of active use
Advisories And Exploit References
Description
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Oct 28, 2026 | n/a | Not reported |
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| checkout-files-upload-woocommercewordpress-plugin | See advisory | 2.4.0 |
| Checkout Files Upload for WooCommerce | See advisory | 2.4.0 |
Patched Releases
Checkout Files Upload for WooCommerce
2.4.0
checkout-files-upload-woocommerce
2.4.0
Timeline
Publicly disclosed
Oct 28, 2026
Added to Industry KEV feed
Oct 28, 2026
Weakness Type
- CWE-434 Unrestricted Upload of File with Dangerous Type
FAQ
Common Questions.
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 exe…
Affected: checkout-files-upload-woocommerce (wordpress-plugin); Checkout Files Upload for WooCommerce. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Oct 28, 2026.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Checkout Files Upload for WooCommerce 2.4.0, checkout-files-upload-woocommerce 2.4.0.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2026-103688 On Your Attack Surface?
Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.
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