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Vulnerabilities

Vulnerability · CVE-2026-103688

Unrestricted Upload of File with Dangerous Type

Published Oct 28, 2026 · catalog updated Oct 28, 2026 · WP Wham Checkout Files Upload for WooCommerce

Last checked Nov 1, 2026. A connected source was read within the last 7 days.

Patch now

CVE-2026-103688 is in the CISA known-exploited catalog. Confirm WP Wham Checkout Files Upload for WooCommerce against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.

Same product and reporting

Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
0.61%
Remediation
Remediation guidance
Affected products
vendor WP Wham Checkout Files Upload for WooCommerce

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor WP Wham Checkout Files Upload for WooCommerceversion unspecified

How to fix CVE-2026-103688

  • Vendor action

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

  • Version check

    No version range is stored, so an installed version cannot be checked on this page.

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2026-103688 is in the CISA known-exploited catalog. Confirm WP Wham Checkout Files Upload for WooCommerce against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

What should an analyst verify?

No weakness class is stored. EPSS 0.61%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 28, 2026 · VulnCheck KEV

    Detected

    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.

  2. Oct 28, 2026 · CISA KEV

    Known exploited

    Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Sources

  • CVE.orgVulnerability recordCVE-2026-103688

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-103688

    30-day exploitation probability 0.61%

    first.org
  • VulnCheck KEVConfirmed exploitationCVE-2026-103688

    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

    vulncheck.com

References

Freshness

Last verified in this catalog Nov 1, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 1, 2026
  • VulnCheck KEVNov 1, 2026
  • CVE.orgOct 29, 2026