CVE-2026-74922 PUBLISHED

Document Gallery 4.1 - 5.1.1 - Unauthenticated Document Thumbnail Replacement via Thumber Webhook Signature Bypass

Assigner: WPScan
Reserved: 17.08.2026 Published: 19.10.2026 Updated: 19.10.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS Score: 5.3

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	Low
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	Unknown
Product	Document Gallery
Versions	Default: unknown affected from 4.1 to 5.1.1 (incl.)

Credits

Artus KG finder
WPScan coordinator

References

https://wpscan.com/vulnerability/850aaa4e-82ff-479f-bdcd-6cb8089325bd/

Problem Types

CWE-345 Insufficient Verification of Data Authenticity CWE