CVE-2026-11430— Grav CMS Scheduler Webhook Authentication Bypass via Null Short-Circuit

Grav CMS Scheduler Webhook Authentication Bypass via Null Short-Circuit

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

认证算法的不正确实现

Grav 授权问题漏洞

Grav Grav是Grav组织开源的一款CMS内容管理系统。 Grav 2.0.9之前版本存在授权问题漏洞，该漏洞源于webhook token检查中的认证绕过，当webhook功能启用但未配置webhookToken时，复合条件短路导致跳过令牌验证，可能允许未认证的远程攻击者通过POST /scheduler/webhook触发已配置的定时任务。

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