CVE-2026-5427

Published: Apr 17, 2026 Last Modified: Apr 17, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 5,3
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: none
Integrity: low
Availability: none

Description

AI Translation Available

The Kubio plugin for WordPress is vulnerable to Arbitrary File Upload in versions up to and including 2.7.2. This is due to insufficient capability checks in the kubio_rest_pre_insert_import_assets() function, which is hooked to the rest_pre_insert_{post_type} filter for posts, pages, templates, and template parts. When a post is created or updated via the REST API, Kubio parses block attributes looking for URLs in the 'kubio' attribute namespace and automatically imports them via importRemoteFile() without verifying the user has the upload_files capability. This makes it possible for authenticated attackers with Contributor-level access and above to bypass WordPress's normal media upload restrictions and upload files fetched from external URLs to the media library, creating attachment posts in the database.

862

Missing Authorization

Incomplete
Abstraction: Class Structure: Simple
Common Consequences
Security Scopes Affected:
Confidentiality Integrity Access Control Availability
Potential Impacts:
Read Application Data Read Files Or Directories Modify Application Data Modify Files Or Directories Gain Privileges Or Assume Identity Bypass Protection Mechanism Dos: Crash, Exit, Or Restart Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Dos: Resource Consumption (Other)
Applicable Platforms
Technologies: AI/ML, Database Server, Not Technology-Specific, Web Server
Likelihood of Exploit: High
View CWE Details
https://plugins.trac.wordpress.org/browser/kubio/tags/2.7.1…
https://plugins.trac.wordpress.org/browser/kubio/tags/2.7.1/lib/filters/post-in…
https://plugins.trac.wordpress.org/browser/kubio/tags/2.7.1…
https://plugins.trac.wordpress.org/browser/kubio/tags/2.7.1/lib/importer/import…
https://plugins.trac.wordpress.org/browser/kubio/tags/2.7.1…
https://plugins.trac.wordpress.org/browser/kubio/tags/2.7.1/lib/src/Core/Import…
https://plugins.trac.wordpress.org/browser/kubio/trunk/lib/…
https://plugins.trac.wordpress.org/browser/kubio/trunk/lib/filters/post-insert.…
https://plugins.trac.wordpress.org/browser/kubio/trunk/lib/…
https://plugins.trac.wordpress.org/browser/kubio/trunk/lib/importer/importer-fi…
https://plugins.trac.wordpress.org/browser/kubio/trunk/lib/…
https://plugins.trac.wordpress.org/browser/kubio/trunk/lib/src/Core/Importer.ph…
https://plugins.trac.wordpress.org/changeset/3506647/kubio/…
https://plugins.trac.wordpress.org/changeset/3506647/kubio/trunk/lib/src/Core/I…
https://www.wordfence.com/threat-intel/vulnerabilities/id/d…
https://www.wordfence.com/threat-intel/vulnerabilities/id/d8096f3c-e1a9-424f-af…