CVE-2026-105436
Deferred Deferred - Pending Action

Deserialization of Untrusted Data in MainWP Child

Publication date: 2026-10-08

Last updated on: 2026-10-08

Assigner: Patchstack

Description
Deserialization of Untrusted Data vulnerability in MainWP MainWP Child mainwp-child allows Object Injection.This issue affects MainWP Child: from n/a through 6.2.1.

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Meta Information

Published
2026-10-08
Last Modified
2026-10-08
Generated
2026-10-08
AI Q&A
2026-10-08
EPSS Evaluated
N/A
NVD
CVE-2026-105436
EUVD
EUVD-2026-95105

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
MainWP MainWP Child 0

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 a deserialization of untrusted data issue in the MainWP Child plugin for WordPress, affecting versions up to 6.2.1. It allows object injection, where attackers can send crafted data to execute arbitrary commands or gain unauthorized access. Exploitation requires a privileged user to interact with malicious input, such as clicking a link or submitting a form.

Detection Guidance

Detecting this vulnerability requires checking the installed version of the MainWP Child plugin. Use the following command to list installed WordPress plugins via command line: wp plugin list --format=json. If the MainWP Child plugin version is 6.2.1 or earlier, the system is vulnerable.

Impact Analysis

If exploited, this vulnerability could allow attackers to execute arbitrary commands on your server or gain unauthorized access to your WordPress site. This may lead to data theft, site defacement, or further compromise of your system. Successful attacks require a privileged user to interact with malicious input.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating GDPR and HIPAA requirements for data protection and security. Non-compliance may result in legal penalties, reputational damage, and loss of trust. Immediate patching is recommended to maintain compliance.

Mitigation Strategies

Update the MainWP Child plugin to version 6.2.2 or later immediately to patch the vulnerability. Apply Patchstack's mitigation rule to block attacks until the update is completed.

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