What’s Vulnerable › Vulnerabilities

CVE-2026-89138: Filter Gallery <= 1.1.4 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Post Modification via 'image_id' Parameter via ufg_save_gallery AJAX Action

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-18 · updated 2026-09-18
• Weakness: CWE-862

Description

The Filter Gallery plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 1.1.4. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with subscriber-level access and above, to overwrite the title and content of arbitrary WordPress posts, write the _wp_attachment_image_alt meta key on arbitrary posts, and create or overwrite arbitrary ufg_gallery_* options.

Affected products

• farazfrank Filter Gallery: through 1.1.4

References

• https://plugins.trac.wordpress.org/browser/filter-gallery/tags/1.1.4/filter-gallery.php#L843
• https://plugins.trac.wordpress.org/browser/filter-gallery/tags/1.1.4/filter-gallery.php#L845
• https://plugins.trac.wordpress.org/browser/filter-gallery/tags/1.1.4/filter-gallery.php#L884
• https://plugins.trac.wordpress.org/browser/filter-gallery/tags/1.1.4/filter-gallery.php#L885
• https://plugins.trac.wordpress.org/browser/filter-gallery/tags/1.1.4/filter-gallery.php#L902
• https://plugins.trac.wordpress.org/changeset?reponame=&old=3695415%40filter-gallery&new=3695415%40filter-gallery
• https://www.wordfence.com/threat-intel/vulnerabilities/id/73577a0d-8aac-4369-8022-98c198f79224?source=cve

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