🛡️ CVE-2023-34253
🟠 CVSS 8.8 — High ✅ No Known Exploit CWE-1336 NVD
8.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

Details

Severity HIGH
CVSS Score 8.8
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE CWE-1336
Public Exploit ✅ No
Source NVD
Published 2023-06-16
Updated 2026-06-08
Modified 2024-02-18

Affected Packages

Software From version Fixed in
getgrav/grav — 1.7.42
grav — 1.7.42

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