{"id":"CVE-2023-34448","aliases":["GHSA-whr7-m3f8-mpm8"],"url":"https://o3.security/vulnerability/CVE-2023-34448","summary":"Grav Server-side Template Injection (SSTI) via Twig Default Filters","details":"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`.","published":"2023-06-14T22:06:01.338Z","modified":"2026-08-08T03:47:45.355495833Z","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":2,"affectedPackages":[{"ecosystem":"Packagist","name":"getgrav/grav","fixedVersion":"1.7.42"}],"fix":{"url":"https://github.com/getgrav/grav/commit/8c2c1cb72611a399f13423fc6d0e1d998c03e5c8","label":"getgrav/grav@8c2c1cb"},"references":[{"type":"WEB","url":"https://github.com/twigphp/Twig/blob/v1.44.7/src/Environment.php#L148"},{"type":"WEB","url":"https://huntr.dev/bounties/3ef640e6-9e25-4ecb-8ec1-64311d63fe66/"},{"type":"WEB","url":"https://www.github.com/getgrav/grav/commit/9d6a2dba09fd4e56f5cdfb9a399caea355bfeb83"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/34xxx/CVE-2023-34448.json"},{"type":"ADVISORY","url":"https://github.com/getgrav/grav/security/advisories/GHSA-whr7-m3f8-mpm8"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-34448"},{"type":"FIX","url":"https://github.com/getgrav/grav/commit/8c2c1cb72611a399f13423fc6d0e1d998c03e5c8"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-08T03:47:45.355495833Z"}}