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NextGEN Gallery CVE-2026-6566

| EUVD-2026-31063 MEDIUM
Authorization Bypass Through User-Controlled Key (CWE-639)
2026-05-20 Wordfence GHSA-4hjj-956w-4cwm
WordPress Authentication Bypass
4.3
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

Lifecycle Timeline

1
Analysis Generated
May 20, 2026 - 07:02 vuln.today

DescriptionNVD

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).

AnalysisAI

{id} REST endpoint validates only the 'NextGEN Manage gallery' capability, entirely omitting gallery ownership checks and the 'NextGEN Manage others gallery' permission - making cross-user image destruction possible at low privilege. No public exploit code identified at time of analysis and no CISA KEV listing; however, when deleteImg is enabled (default), exploitation results in irreversible file-level data loss beyond what the CVSS 4.3 integrity score alone conveys.

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CVE-2026-6566 vulnerability details – vuln.today
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