CVE-2026-12995: Hiroaki-Miyashita Custom Field Template

Medium severity, CVSS 4.3. EPSS: 0.2% chance of exploitation in the next 30 days.

The Custom Field Template plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 2.7.8 via the edit_meta_value due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with contributor-level access and above, to delete arbitrary media attachments site-wide by supplying any numeric attachment ID in the file-field parameter alongside the corresponding delete flag, causing content loss and broken pages. Exploitation requires that the attacker's post is governed by a Custom Field Template containing at least one file-type field with the mediaRemove option not enabled, which is the default configuration for file fields.

Affected products

• Hiroaki-Miyashita Custom Field Template: up to and including 2.7.8

Published 2026-09-22. Last modified 2026-09-22.