CVE-2023-34253

Katalog CVE

CVSS 7.2 · High EPSS 2,1%

Kerentanan Incomplete List of Disallowed Inputs pada getgrav grav. Skor CVSS 3.1 7.2 (High) menurut NVD.

Deskripsi (NVD)

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 are not banned, (2) using capitalised callable names, and (3) using fully-qualified names for referencing callables. Consequently, a low privileged attacker with login access to Grav Admin panel and page creation/update permissions is able to inject malicious templates to obtain remote code execution. A patch in version 1.7.42 improves the denylist.

Rincian

Terbit di NVD

14 Juni 2023

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

7.2 (High), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-184: Incomplete List of Disallowed Inputs
CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine
CWE-94: Improper Control of Generation of Code ('Code Injection')

EPSS (30 hari)

2,1% peluang dieksploitasi; lebih tinggi dari 80,9% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/getgrav/grav/security/advisories/GHSA-j3v8-v77f-fvgm exploit · advisory vendor
• https://github.com/getgrav/grav/commit/71bbed12f950de8335006d7f91112263d8504f1b patch
• https://www.github.com/getgrav/grav/commit/9d6a2dba09fd4e56f5cdfb9a399caea355bfeb83 patch
• https://huntr.dev/bounties/3ef640e6-9e25-4ecb-8ec1-64311d63fe66/ exploit · advisory pihak ketiga
• https://github.com/getgrav/grav/blob/1.7.40/system/src/Grav/Common/Utils.php#L1952-L2190 issue tracking