CVE-2026-6566
MediumCVSS 4.3Exploitation Probability (EPSS)
Low risk18th percentile - higher than 18% of all known CVEs
Summary
The NextGEN Gallery plugin for WordPress up to version 4.2.0 has an Insecure Direct Object Reference vulnerability in the image deletion REST API. Object-level authorization is missing – only 'NextGEN Manage gallery' permissions are checked, without gallery ownership verification. An authenticated attacker with Subscriber privileges and 'NextGEN Manage gallery' capability can delete other users' images and associated files from disk.
Risk Assessment
An attacker can delete other users' images, leading to data loss and potential content integrity compromise.
Recommendation
Update the NextGEN Gallery plugin to a version above 4.2.0 and review user permissions.
Original NVD description (English source)
The Photo Gallery, Sliders, Proofing and Themes – NextGEN Gallery plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to and including 4.2.0. This is due to insufficient object-level authorization in the image deletion REST flow where the permission callback for DELETE /imagely/v1/images/{id} only checks 'NextGEN Manage gallery' permissions and does not enforce gallery ownership or 'NextGEN Manage others gallery' permissions. This makes it possible for authenticated attackers, with Subscriber-level privileges and 'NextGEN Manage gallery' capability, to delete gallery images belonging to other users as well as their associated image files from disk when deleteImg is enabled (default).