{"id":"CVE-2026-11430","title":"Grav CMS Scheduler Webhook Authentication Bypass via Null Short-Circuit","summary":"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…","severity":"high","cvss":7.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","cvssSource":"cna","cwe":["CWE-303"],"vendor":"Trilby Media","product":"grav-plugin-scheduler-webhook","affected":["grav-plugin-scheduler-webhook < 1.1.3","getgrav/grav < 2.0.9"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-08-07T20:56:04.638693Z"},"published":"2026-08-07","updated":"2026-10-01","sourceUpdated":"2026-10-01T21:44:58.603Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-11430","references":[{"url":"https://github.com/getgrav/grav/security/advisories/GHSA-xwv3-2mv2-w33x","label":"GitHub Security Advisory"},{"url":"https://github.com/getgrav/grav","label":"Product Repository"},{"url":"https://github.com/getgrav/grav/commit/694f1dae06d9061bbf0669c4291e3b206f998d71","label":"Patch Commit"},{"url":"https://www.vulncheck.com/advisories/grav-cms-scheduler-webhook-authentication-bypass-via-null-short-circuit"}],"tags":["cve.org"],"epss":0.00958,"epssPercentile":0.60071,"ingestedAt":"2026-10-01T23:03:32.843Z","slug":"CVE-2026-11430","body":"## Overview\n\nGrav 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.\n\n## Affected\n\n- `grav-plugin-scheduler-webhook < 1.1.3`\n- `getgrav/grav < 2.0.9`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":40.2,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}