Deserialization in Creativewerkdesigns Wpsyncsheets For Contact Form 7 – Cf7 Google Sheets Connector & Save To Database

CVE-2026-104010

The WPSyncSheets For Contact Form 7 – CF7 Google Sheets Connector & Save to Database plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 1.8.0 via the 'any non-system CF7 field (e.g., your-message)' parameter parameter. This is due to insufficient sanitization of CF7 submission field values before database storage and the absence of an allowed_classes restriction on maybe_unserialize() during admin retrieval. This makes it possible for unauthenticated attackers to execute code on the server. Successful exploitation of the remote code execution gadget chain requires that a Google Sheets access token be configured in the plugin (its primary advertised feature), as this triggers autoloading of the bundled Monolog 2.10.0 library whose classes form the exploitable gadget chain; however, the underlying PHP Object Injection occurs regardless.

Vulnerability class: Insecure Deserialization

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-104010?
CVE-2026-104010 is a high-severity vulnerability in Creativewerkdesigns Wpsyncsheets For Contact Form 7 – Cf7 Google Sheets Connector & Save To Database, classified under Deserialization of Untrusted Data. CVSS score: 7.5/10. Published 2026-11-06.
How severe is CVE-2026-104010?
High severity. CVSS v3 base score is 7.5 out of 10.