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CVE-2026-11430: Incorrect Implementation of Authentication Algorithm in Trilby Media grav-plugin-scheduler-webhook

0
Medium
VulnerabilityCVE-2026-11430cvecve-2026-11430
Published: 08/07/2026 (08/07/2026, 19:02:10 UTC)
Source: CVE Database V5
Vendor/Project: Trilby Media
Product: grav-plugin-scheduler-webhook

Description

Grav CMS's scheduler-webhook plugin contains an authentication bypass in the webhook token check. When the webhook feature is enabled but no webhookToken is configured, a compound conditional short-circuits and skips token validation, so an unauthenticated remote attacker who can reach POST /scheduler/webhook can trigger the operator's already-configured scheduled jobs by sending a single request. The primitive is triggering-existing-jobs, not attacker-chosen command execution: the attacker controls when the jobs run and which one runs (via ?job=), but does not control what the jobs do. Code execution follows only when the operator has configured a job that shells out, and even then the attacker controls timing rather than payload. Not a default-install issue: reaching the endpoint requires the separate scheduler-webhook GPM plugin to be installed, scheduler.modern.webhook.enabled to be true (default false), and no webhookToken to be configured; a stock Grav or Grav-Admin install exposes nothing here.

CVSS v4.0

Score 6.9medium

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Vuln. Confidentiality
Low
Vuln. Integrity
Low
Vuln. Availability
Low
Subsq. Confidentiality
None
Subsq. Integrity
None
Subsq. Availability
None
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

Technical Details

Data Version
5.2
Assigner Short Name
VulnCheck
Date Reserved
2026-06-05T21:01:53.800Z
Cvss Version
4.0
State
PUBLISHED
Remediation Level
null

Threat ID: 6a76350bbf8831d5390b01b9

Added to database: 08/07/2026, 19:42:03 UTC

Last updated: 08/07/2026, 19:42:03 UTC

Views: 1

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