CVE-2023-34448 Information

Description

Grav is a flat-file content management system. Prior to version 1.7.42 the patch for CVE-2022-2073 a server-side template injection vulnerability in Grav leveraging the default filter() function did not block other built-in functions exposed by Twig’s Core Extension that could be used to invoke arbitrary unsafe functions thereby allowing for remote code execution. A patch in version 1.74.2 overrides the built-in Twig map() and reduce() filter functions in system/src/Grav/Common/Twig/Extension/GravExtension.php to validate the argument passed to the filter in $arrow.

Reference

https://github.com/twigphp/Twig/blob/v1.44.7/src/Environment.php#L148 https://github.com/getgrav/grav/security/advisories/GHSA-whr7-m3f8-mpm8 https://www.github.com/getgrav/grav/commit/9d6a2dba09fd4e56f5cdfb9a399caea355bfeb83 https://github.com/getgrav/grav/commit/8c2c1cb72611a399f13423fc6d0e1d998c03e5c8 https://huntr.dev/bounties/3ef640e6-9e25-4ecb-8ec1-64311d63fe66/