Is CVE-2026-5427 actively exploited?

No active exploitation of CVE-2026-5427 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-5427 be exploited remotely?

Yes. CVE-2026-5427 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-5427?

CVE-2026-5427 has a CVSS score of 5.3 (MEDIUM).

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MEDIUM

CVE-2026-5427

CWE-862Published: April 17, 2026· Updated: Apr 22, 2026

5.3

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:1.9th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-5427 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.