{"id":"CVE-2023-37897","state":"PUBLISHED","title":"Server-side Template Injection (SSTI) in grav","description":"Grav is a file-based Web-platform built in PHP. Grav is subject to a server side template injection (SSTI) vulnerability. The fix for another SSTI vulnerability using `|map`, `|filter` and `|reduce` twigs implemented in the commit `71bbed1` introduces bypass of the denylist due to incorrect return value from `isDangerousFunction()`, which allows to execute the payload prepending double backslash (`\\\\`). The `isDangerousFunction()` check in version 1.7.42 and onwards retuns `false` value instead of `true` when the `\\` symbol is found in the `$name`. This vulnerability can be exploited if the attacker has access to: 1. an Administrator account, or 2. a non-administrator, user account that has Admin panel access and Create/Update page permissions. A fix for this vulnerability has been introduced in commit `b4c6210` and is included in release version `1.7.42.2`. Users are advised to upgrade. There are no known workarounds for this vulnerability.\n\n","publishedAt":"2023-07-18T20:22:13.008Z","updatedAt":"2024-10-18T17:19:07.910Z","severity":{"score":7.2,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["getgrav grav"],"affected":[{"vendor":"getgrav","product":"grav","versions":[{"version":"< 1.7.42.2","status":"affected"}]}],"references":["https://github.com/getgrav/grav/security/advisories/GHSA-9436-3gmp-4f53","https://github.com/getgrav/grav/commit/71bbed12f950de8335006d7f91112263d8504f1b","https://github.com/getgrav/grav/commit/b4c62101a43051fc7f5349c7d0a5b6085375c1d7"],"weaknesses":["CWE-74","CWE-393"],"ingestedAt":"2026-10-29T20:06:08.715Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/37xxx/CVE-2023-37897.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2023-37897","state":"PUBLISHED","datePublished":"2023-07-18T20:22:13.008Z","dateUpdated":"2024-10-18T17:19:07.910Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2023-07-10T17:51:29.609Z"},"containers":{"cna":{"title":"Server-side Template Injection (SSTI) in grav","descriptions":[{"lang":"en","value":"Grav is a file-based Web-platform built in PHP. Grav is subject to a server side template injection (SSTI) vulnerability. The fix for another SSTI vulnerability using `|map`, `|filter` and `|reduce` twigs implemented in the commit `71bbed1` introduces bypass of the denylist due to incorrect return value from `isDangerousFunction()`, which allows to execute the payload prepending double backslash (`\\\\`). The `isDangerousFunction()` check in version 1.7.42 and onwards retuns `false` value instead of `true` when the `\\` symbol is found in the `$name`. This vulnerability can be exploited if the attacker has access to: 1. an Administrator account, or 2. a non-administrator, user account that has Admin panel access and Create/Update page permissions. A fix for this vulnerability has been introduced in commit `b4c6210` and is included in release version `1.7.42.2`. Users are advised to upgrade. There are no known workarounds for this vulnerability.\n\n"}],"affected":[{"vendor":"getgrav","product":"grav","versions":[{"version":"< 1.7.42.2","status":"affected"}]}],"references":[{"url":"https://github.com/getgrav/grav/security/advisories/GHSA-9436-3gmp-4f53","name":"https://github.com/getgrav/grav/security/advisories/GHSA-9436-3gmp-4f53","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/getgrav/grav/commit/71bbed12f950de8335006d7f91112263d8504f1b","name":"https://github.com/getgrav/grav/commit/71bbed12f950de8335006d7f91112263d8504f1b","tags":["x_refsource_MISC"]},{"url":"https://github.com/getgrav/grav/commit/b4c62101a43051fc7f5349c7d0a5b6085375c1d7","name":"https://github.com/getgrav/grav/commit/b4c62101a43051fc7f5349c7d0a5b6085375c1d7","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.2,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-74","lang":"en","description":"CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-393","lang":"en","description":"CWE-393: Return of Wrong Status Code","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2023-07-18T20:22:13.008Z"},"source":{"advisory":"GHSA-9436-3gmp-4f53","discovery":"UNKNOWN"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://github.com/getgrav/grav/security/advisories/GHSA-9436-3gmp-4f53","name":"https://github.com/getgrav/grav/security/advisories/GHSA-9436-3gmp-4f53","tags":["x_refsource_CONFIRM","x_transferred"]},{"url":"https://github.com/getgrav/grav/commit/71bbed12f950de8335006d7f91112263d8504f1b","name":"https://github.com/getgrav/grav/commit/71bbed12f950de8335006d7f91112263d8504f1b","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://github.com/getgrav/grav/commit/b4c62101a43051fc7f5349c7d0a5b6085375c1d7","name":"https://github.com/getgrav/grav/commit/b4c62101a43051fc7f5349c7d0a5b6085375c1d7","tags":["x_refsource_MISC","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-02T17:23:27.730Z"}},{"title":"CISA ADP Vulnrichment","affected":[{"vendor":"getgrav","product":"grav","defaultStatus":"unknown","versions":[{"version":"0","status":"affected","lessThan":"1.7.42.2","versionType":"custom"}],"cpes":["cpe:2.3:a:getgrav:grav:*:*:*:*:*:*:*:*"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-10-18T16:06:14.894046Z","id":"CVE-2023-37897","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-10-18T17:19:07.910Z"}}]}}}