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Vulnerabilities

Vulnerability · CVE-2026-18143

Unrestricted Upload of File with Dangerous Type

Published Sep 28, 2026 · catalog updated Sep 28, 2026 · Addify Request a Quote for WooCommerce

Patch now

CVE-2026-18143 is in the CISA known-exploited catalog. Confirm Addify Request a Quote for WooCommerce against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Unknown—
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
1.71%
Remediation
Remediation guidance
Affected products
stated Request a Quote for WooCommerce · vendor Addify Request a Quote for WooCommerce

The Request a Quote for WooCommerce plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 2.9.2 via the function. This is due to missing file extension and MIME type validation in the popup upload handler, which uses the raw attacker-supplied filename directly as the destination for . This makes it possible for unauthenticated attackers to upload executable files, such as PHP files, to a web-accessible temporary RFQ upload directory when a public quote rule with the multi-page popup flow is enabled. Initial-access exploit intelligence.

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.

  • stated Request a Quote for WooCommerce<= 2.9.2
  • vendor Addify Request a Quote for WooCommerceversion unspecified

How to fix CVE-2026-18143

What to do

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

Should you patch?

CVE-2026-18143 is in the CISA known-exploited catalog. Confirm Addify Request a Quote for WooCommerce against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with Request a Quote for WooCommerce <= 2.9.2. 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 1.71%. 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. Sep 28, 2026 · VulnCheck KEV

    Detected

    The Request a Quote for WooCommerce plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 2.9.2 via the function. This is due to missing file extension and MIME type validation in the popup upload handler, which uses the raw attacker-supplied filename directly as the destination for . This makes it possible for unauthenticated attackers to upload executa

  2. Sep 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-2026-18143

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-18143

    30-day exploitation probability 1.7%

    first.org
  • VulnCheck KEVConfirmed exploitationCVE-2026-18143

    The Request a Quote for WooCommerce plugin for WordPress is vulnerable to Arbitrary File Upload in all versions up to, and including, 2.9.2 via the function. This is due to missing file extension and MIME type validation in the popup upload handler, which uses the raw attacker-su

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.