smub NextGEN Gallery Plugin up to 4.2.0 on WordPress /imagely/v1/images/ authorization

Summaryinfo

A vulnerability described as critical has been identified in smub NextGEN Gallery Plugin up to 4.2.0 on WordPress. This impacts an unknown function of the file /imagely/v1/images/. The manipulation results in authorization. This vulnerability is cataloged as CVE-2026-6566. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as critical has been found in smub NextGEN Gallery Plugin up to 4.2.0 on WordPress. Affected is an unknown code block of the file /imagely/v1/images/. The manipulation with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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).

The weakness was shared by Bao Luu Gia Nguyen. The advisory is shared for download at wordfence.com. This vulnerability is traded as CVE-2026-6566 since 04/18/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 05/20/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-31063). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Photo Gallery Software

Vendor

• smub

Name

• NextGEN Gallery Plugin

Version

• 4.0
• 4.1
• 4.2.0

CPE 2.3info

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CPE 2.2info

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Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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