Meow Gallery: A security weakness

Meow Gallery is affected by a security weakness. Exploitation requires an authenticated author account. The resulting impact depends on how the affected component exposes the vulnerable operation. The published affected range is <= 5.4.4.

CVE / CNA score 4.3 CVSS 3.1 · security@wordfence.com

NVD score Pending NVD has not published its own CVSS assessment.

Component: Meow Gallery
Plugin slug: meow-gallery
Affected: <= 5.4.4
Safe version: See mitigation notes
Published: Jun 13, 2026
Weakness: CWE-639 — Authorization Bypass Through User-Controlled Key

This CVE was published Jun 13, 2026 and is one of 6 known issues for this plugin.

What to do

Update, patch or deactivate.

No fixed release is identified. Update Meow Gallery when a release after 5.4.4 becomes available; until then, disable and remove it when the site's risk warrants. The official upstream changelog lists version 5.5.3, which is newer than the published affected range. Its changelog does not clearly confirm this specific fix, so it is not counted as a known-safe release.

No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

The Meow Gallery plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the REST API endpoint /wp-json/meow-gallery/v1/save_shortcode in all versions up to, and including, 5.4.4 This makes it possible for authenticated attackers, with Author-level access and above, to arbitrarily create or overwrite existing gallery shortcode records by supplying a user-controlled id value. The endpoint performs database update operations without verifying that the requesting user is authorized to modify the referenced gallery record or create their own.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

References

Primary and upstream sources

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