CVE-2026-3279
Deferred Deferred - Pending Action
Unauthorized jQuery Version Downgrade in Enable jQuery Migrate Helper

Publication date: 2026-05-27

Last updated on: 2026-05-27

Assigner: Wordfence

Description
The Enable jQuery Migrate Helper plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the `downgrade_jquery_version()` function in all versions up to, and including, 1.4.1. This is due to the function only verifying a nonce without checking user capabilities. This makes it possible for authenticated attackers, with Subscriber-level access and above, to downgrade the site-wide jQuery version from 3.7.1 to the legacy 1.12.4-wp release, which has knowns security vulnerabilities.
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Meta Information
Published
2026-05-27
Last Modified
2026-05-27
Generated
2026-06-16
AI Q&A
2026-05-27
EPSS Evaluated
2026-06-15
NVD
CVE-2026-3279
EUVD
EUVD-2026-32099
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
enable jquery_migrate_helper to 1.4.1 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
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Executive Summary

The Enable jQuery Migrate Helper plugin for WordPress has a vulnerability due to a missing capability check in the function downgrade_jquery_version(). This function only verifies a nonce but does not check if the user has the proper permissions.

As a result, authenticated users with Subscriber-level access or higher can exploit this flaw to downgrade the site-wide jQuery version from 3.7.1 to an older legacy version 1.12.4-wp, which contains known security vulnerabilities.

Impact Analysis

This vulnerability allows attackers with low-level authenticated access to downgrade the jQuery version used by the WordPress site to an older, insecure version.

Downgrading to jQuery 1.12.4-wp exposes the site to known security issues present in that legacy version, potentially enabling further attacks or exploitation.

Although it does not directly compromise confidentiality or availability, it can lead to unauthorized modification of data and increase the risk of further security breaches.

Compliance Impact

The vulnerability allows authenticated users with Subscriber-level access and above to downgrade the site-wide jQuery version to an older release with known security vulnerabilities. This unauthorized modification of data and introduction of insecure components could potentially lead to increased risk of data integrity issues or exploitation.

However, the provided information does not explicitly describe the direct impact of this vulnerability on compliance with common standards and regulations such as GDPR or HIPAA.

Mitigation Strategies

To mitigate this vulnerability, you should update the Enable jQuery Migrate Helper plugin to a version later than 1.4.1 where the missing capability check on the downgrade_jquery_version() function is fixed.

Additionally, restrict user roles to prevent Subscriber-level or higher users from triggering the downgrade functionality until the plugin is updated.

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