CVE-2023-34253 Grav vulnerable to Server-side Template Injection (SSTI) via Denylist Bypass

Grav is a flat-file content management system. Prior to version 1.7.42, the denylist introduced in commit 9d6a2d to prevent dangerous functions from being executed via injection of malicious templates was insufficient and could be easily subverted in multiple ways -- 1 using unsafe functions that...

CVE-2023-34252 Grav Server-side Template Injection via Insufficient Validation in filterFilter

Grav is a flat-file content management system. Prior to version 1.7.42, there is a logic flaw in the GravExtension.filterFilter function whereby validation against a denylist of unsafe functions is only performed when the argument passed to filter is a string. However, passing an array as a...