CVE-2026-74922Network attack vector

Thumbnail replacement via webhook signature bypass

Published Oct 19, 2026 · Updated Oct 19, 2026

Document Gallery's webhook signature bypass allows remote attackers to replace document thumbnails through forged callbacks. The WordPress plugin skips signature verification when no shared secret is configured, its default state. Published thumbnails for any document are affected in versions 4.1 through 5.1.1 without authentication.

CVSS severity5.3
Medium
EPSS probability0.12%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Document Gallery's webhook signature bypass allows remote attackers to replace document thumbnails through forged callbacks. The WordPress plugin skips signature verification when no shared secret is configured, its default state. Published thumbnails for any document are affected in versions 4.1 through 5.1.1 without authentication.

The record

CVE
CVE-2026-74922
Published
Oct 19, 2026
Updated
Oct 19, 2026
Vendor
Dan Rossiter
Product
Document Gallery
Classifications
CWE-345, T1491.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.1 <=5.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Dan Rossiter · Document Galleryversion=4.1 <=5.1.1

Published CVSS scores

5.3WPScanCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-345Insufficient Verification of Data Authenticity
T1491.002External Defacement

Public exploit references

No public exploit references are available in this record.

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Technologies

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