# CVE-2026-74922: Document Gallery WordPress plugin webhook signature bypass

Source: https://junglewise.ai/threats/cve-2026-74922-the-document-gallery-wordpress-plugin-through-5-1-1-does-not  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-19. Updated: 2026-10-19  
License: CC BY 4.0 with a link back

CVE-2026-74922 · Severity: medium · CVSS 5.3 · Published 2026-10-19

The Document Gallery WordPress plugin provides a way to display document thumbnails on websites. When no shared secret is configured (the default state), unauthenticated attackers can replace the thumbnail image for any document without authentication. This allows attackers to inject malicious or inappropriate images into a site's published content.

Vendors: [WordPress.org](https://junglewise.ai/threats/vendors/wordpress-org).

## Quick answers

**Is CVE-2026-74922 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-74922 being exploited in the wild.

**How severe is CVE-2026-74922?** Medium severity, with a CVSS score of 5.3, published 19 October 2026.

**Which products and versions are affected?** WordPress.org Document Gallery 4.1 through 5.1.1.

**Is there a fix for CVE-2026-74922?** No fixed version is recorded yet. Configure a shared secret in the plugin settings to enable webhook signature verification, which will prevent unauthenticated requests from modifying document thumbnails. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-74922 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-74922?** Check whether you run WordPress.org Document Gallery at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix


Configure a shared secret in the plugin settings to enable webhook signature verification, which will prevent unauthenticated requests from modifying document thumbnails.

## Technical details

The plugin fails to verify webhook signatures on an unauthenticated endpoint when no shared secret is configured. An attacker can send arbitrary requests to the thumber webhook endpoint to replace document thumbnails. The vulnerability affects versions 4.1 through 5.1.1 and requires only network access to the webhook endpoint; no authentication or user interaction is needed.

## Affected products

- wordpress.org Document Gallery 4.1 through 5.1.1

## Timeline

- 2026-10-13: disclosed
- 2026-10-19: advisory

## References

- [https://wordpress.org/plugins](https://wordpress.org/plugins)
- [https://wpscan.com/vulnerability/850aaa4e-82ff-479f-bdcd-6cb8089325bd/](https://wpscan.com/vulnerability/850aaa4e-82ff-479f-bdcd-6cb8089325bd/)