Unauthenticated RCE in a widely deployed WooCommerce plugin enabling full server compromise of e‑commerce WordPress sites.
CVE-2026-103688
Unauthenticated RCE via file upload in WooCommerce Checkout Files Upload plugin
Is CVE-2026-103688 being exploited?
Not confirmed. CVE-2026-103688 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked.
How severe is CVE-2026-103688?
CVE-2026-103688 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-103688?
Yes. A fix has been recorded for CVE-2026-103688. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-103688 affect?
CVE-2026-103688 affects Checkout Files Upload for WooCommerce < 2.4.0, WordPress sites with the plugin installed, PHP web hosts executing files from uploads/. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-103688?
Update plugin to 2.4.0+, disable/limit uploads, and block PHP execution in uploads directory
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attackers can upload PHP/arbitrary files leading to remote code execution and full server compromise via the uploads directory.
Immediate action required
- affected< 2.4.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.