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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

Quick assessment

Affected
farazfrank Filter Gallery
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress 的 Filter Gallery 插件在所有 1.1.4 及以下版本中均存在权限绕过（authorization bypass）漏洞。这是由于插件未正确验证执行操作的用户是否已获授权所致。该漏洞使得拥有至少订阅者（subscriber）权限的已认证攻击者能够： 1. 覆盖任意 WordPress 文章的标题和内容； 2. 在任意文章上写入 元数据键值； 3. 创建或覆盖任意 选项。

CVSS 4.3 · Medium EPSS 0.39% · P34

Affected Version Matrix 1

VendorProduct Version RangeStatus
farazfrank Filter Gallery ≤ 1.1.4 affected
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I. Basic Information for CVE-2026-89138

Vulnerability Information
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Vulnerability Title
Filter Gallery <= 1.1.4 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Post Modification via 'image_id' Parameter via ufg_save_gallery AJAX Action
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
farazfrank Filter Gallery 0 ~ 1.1.4 -

II. Public POCs for CVE-2026-89138

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III. Intelligence Information for CVE-2026-89138

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Other References for CVE-2026-89138 (1)

IV. Related Vulnerabilities

Same product: Filter Gallery
Same vendor: farazfrank
Same weakness: CWE-862