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CVE-2026-74922— Document Gallery 4.1 - 5.1.1 - Unauthenticated Document Thumbnail Replacement via Thumber Webhook Signature Bypass

Quick assessment

Affected
Unknown Document 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.

Document Gallery WordPress 插件（5.1.1 及更早版本）在默认未配置共享密钥的情况下，未对其未经验证的 Webhook 端点之一进行签名验证，这使得未授权用户可以替换该站点为任何文档发布的缩略图图像。

CVSS 5.3 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-74922

Vulnerability Information
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Vulnerability Title
Document Gallery 4.1 - 5.1.1 - Unauthenticated Document Thumbnail Replacement via Thumber Webhook Signature Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
The Document Gallery WordPress plugin through 5.1.1 does not verify the signature on one of its unauthenticated webhook endpoints when no shared secret has been configured, which is the default state, allowing unauthenticated users to replace the thumbnail image the site publishes for any document.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Unknown Document Gallery 4.1 ~ 5.1.1 -

II. Public POCs for CVE-2026-74922

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III. Intelligence Information for CVE-2026-74922

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Same Patch Batch · Unknown · 2026-10-19 · 20 CVEs total

CVE-2026-74921 6.8 MEDIUM Document Gallery 4.0 - 5.1.1 - Contributor+ Stored XSS via Gallery Shortcode Attributes
CVE-2026-94231 5.3 MEDIUM TrueBooker Appointment Booking 1.1.9 - 1.2.9 - Unauthenticated Service and Category Creati
CVE-2026-94272 5.3 MEDIUM Snap Finance 1.0.8 - 3.11.0 - Unauthenticated Arbitrary Order Status Change via Multiple A
CVE-2026-94230 5.3 MEDIUM TrueBooker Appointment Booking 1.1.9 - 1.2.9 - Unauthenticated Booking Creation with Arbit
CVE-2026-94229 5.3 MEDIUM TrueBooker Appointment Booking 1.1.9 - 1.2.9 - Unauthenticated Customer PII Disclosure via
CVE-2026-94228 5.3 MEDIUM TrueBooker Appointment Booking 1.1.9 - 1.2.9 - Unauthenticated Plugin Settings Overwrite v
CVE-2026-86791 5.3 MEDIUM iPOSpays Payment Gateway for WooCommerce < 1.4.7 - Unauthenticated Payment Confirmation Fo
CVE-2026-94294 5.3 MEDIUM App Builder 3.8.4 - 5.7.0 - Unauthenticated Option Write and Redirect via includes/pure.ph
CVE-2026-103311 5.3 MEDIUM Coinbase Commerce Payment Gateway for WooCommerce <= 1.4.1 - Unauthenticated Webhook Signa
CVE-2026-106010 5.3 MEDIUM BDM Digital Payment Gateway 1.2.7 - 1.3.12 - Unauthenticated Payment Confirmation Forgery
CVE-2026-91831 3.8 LOW Subscribe to Comments 2.3 - 2.3.2 - Author+ Email Header Injection via From Name Setting
CVE-2026-110034 3.7 LOW Salon Booking System < 10.31.11 - Unauthenticated Negative Booking Total via Discount Code
CVE-2026-94273 Snap Finance <= 3.11.0 - Unauthenticated Payment Confirmation Forgery via snap_finance_com
CVE-2026-89286 FormFlow for GoHighLevel <= 1.0.0 - Unauthenticated Sensitive Data Disclosure via Log File
CVE-2026-106014 Gateway for Vantiv on WC <= 1.0.1 - Unauthenticated Order Payment Completion via Payment C
CVE-2026-91047 ElementsReady Addons for Elementor <= 6.7.2 - Unauthenticated Paid Download Access Bypass
CVE-2026-106933 Blaze Demo Importer < 1.0.17 - Author+ Stored XSS via SVG Upload
CVE-2026-91046 ElementsReady Addons for Elementor <= 6.7.2 - Subscriber+ Plugin Settings Overwrite via Mi
CVE-2026-106028 ActiveTrail for WooCommerce <= 1.2.6 - Unauthenticated Arbitrary Coupon Creation

IV. Related Vulnerabilities

Same product: Document Gallery
Same vendor: Unknown

V. Comments for CVE-2026-74922

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