CVE-2026-49765
Deferred Deferred - Pending Action
Unauthenticated PHP Object Injection in Integration for Mailchimp

Publication date: 2026-06-15

Last updated on: 2026-06-15

Assigner: Patchstack

Description
Unauthenticated PHP Object Injection in Integration for Mailchimp and Contact Form 7, WPForms, Elementor, Ninja Forms <= 1.1.8 versions.
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Meta Information
Published
2026-06-15
Last Modified
2026-06-15
Generated
2026-06-16
AI Q&A
2026-06-16
EPSS Evaluated
N/A
NVD
CVE-2026-49765
Affected Vendors & Products
Showing 4 associated CPEs
Vendor Product Version / Range
mailchimp integration to 1.1.8 (inc)
wpforms wpforms to 1.1.8 (inc)
elementor elementor to 1.1.8 (inc)
ninja_forms ninja_forms to 1.1.8 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-502 The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
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Executive Summary

This vulnerability is an unauthenticated PHP Object Injection affecting the Integration for Mailchimp and several WordPress plugins including Contact Form 7, WPForms, Elementor, and Ninja Forms in versions up to 1.1.8.

PHP Object Injection occurs when an attacker is able to inject a serialized PHP object into an application without authentication, potentially leading to remote code execution or other malicious actions.

Impact Analysis

This vulnerability has a very high severity with a CVSS score of 9.8, indicating it can be exploited remotely without any privileges or user interaction.

Successful exploitation can lead to complete compromise of the affected system, including full confidentiality, integrity, and availability impacts.

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