Vulnerability Description
Grav 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/getgrav/grav/security/advisories/GHSA-f8wv-xp27-6gq7
- https://www.vulncheck.com/advisories/grav-before-arbitrary-file-write-via-error-
- https://github.com/getgrav/grav/security/advisories/GHSA-f8wv-xp27-6gq7
FAQ
What is CVE-2026-75827?
CVE-2026-75827 is a vulnerability with a CVSS score of 8.8 (HIGH). Grav 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 wit...
How severe is CVE-2026-75827?
CVE-2026-75827 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-75827?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.