creativewerkdesigns WPSyncSheets for Contact Form 7 Plugin up to 1.8.0 on WordPress maybe_unserialize deserialization

Summaryinfo

A vulnerability categorized as critical has been discovered in creativewerkdesigns WPSyncSheets for Contact Form 7 Plugin up to 1.8.0. This impacts the function maybe_unserialize. The manipulation results in deserialization. This vulnerability is known as CVE-2026-104010. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in creativewerkdesigns WPSyncSheets for Contact Form 7 Plugin up to 1.8.0. It has been classified as critical. Affected is the function maybe_unserialize. The manipulation with an unknown input leads to a deserialization vulnerability. CWE is classifying the issue as CWE-502. The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at wordfence.com. This vulnerability is traded as CVE-2026-104010 since 10/01/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 11/06/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• WordPress Plugin

Vendor

• creativewerkdesigns

Name

• WPSyncSheets for Contact Form 7 Plugin

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8.0

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CPE 2.2info

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