CVE-2025-66844: Grav may be vulnerable to SSRF attack via Twig Templates

December 15, 2025 (updated December 17, 2025)

In grav <1.7.49.5, a SSRF (Server-Side Request Forgery) vector may be triggered via Twig templates when page content is processed by Twig and the configuration allows undefined PHP functions to be registered.

References

github.com/Yohane-Mashiro/grav_cve/issues/2
github.com/advisories/GHSA-729w-j79f-2c34
github.com/getgrav/grav
nvd.nist.gov/vuln/detail/CVE-2025-66844

Code Behaviors & Features

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