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.
History

Wed, 18 Dec 2024 22:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2023-06-14T22:00:12.569Z

Updated: 2024-12-18T21:39:39.981Z

Reserved: 2023-05-31T13:51:51.175Z

Link: CVE-2023-34253

cve-icon Vulnrichment

Updated: 2024-08-02T16:01:54.414Z

cve-icon NVD

Status : Modified

Published: 2023-06-14T23:15:11.037

Modified: 2024-11-21T08:06:52.047

Link: CVE-2023-34253

cve-icon Redhat

No data.