{"id":"GHSA-fwwx-3362-3947","title":"Duplicate Advisory: Grav: Blueprint dynamic-data bare-function branch is denylist-gated and omits error_log, giving arbitrary file write","summary":"Duplicate Advisory: Grav: Blueprint dynamic-data bare-function branch is denylist-gated and omits error_log, giving arbitrary file write","severity":"critical","cvss":8.8,"cwe":["CWE-94"],"vendor":"getgrav","product":"getgrav/grav","ecosystem":"composer","affected":["getgrav/grav < 2.0.15"],"published":"2026-08-18","updated":"2026-09-17","sourceUpdated":"2026-09-17T20:56:28Z","source":"GHSA","sourceUrl":"https://github.com/advisories/GHSA-fwwx-3362-3947","references":[{"url":"https://github.com/getgrav/grav/security/advisories/GHSA-f8wv-xp27-6gq7"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-75827"},{"url":"https://www.vulncheck.com/advisories/grav-before-arbitrary-file-write-via-error-log"},{"url":"https://github.com/advisories/GHSA-fwwx-3362-3947"}],"tags":["ghsa","composer"],"ingestedAt":"2026-09-17T21:29:16.994Z","slug":"GHSA-fwwx-3362-3947","body":"## Overview\n\n### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-f8wv-xp27-6gq7. This link is maintained to preserve external references.\n\n### Original Description\nGrav before 2.0.15 contains an arbitrary file write vulnerability in the Blueprint dynamic-data bare-function validation that uses an incomplete denylist instead of a positive allowlist. Attackers with page-edit or blueprint-config access can invoke the error_log function through a data directive to append PHP payloads to web-accessible files, achieving remote code execution.\n\n## Affected packages\n\n- `getgrav/grav < 2.0.15`\n\n## Remediation\n\nRefer to the advisory for the patched release.","depth":"midnight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}