#VU87711 Path traversal in Grav CMS - CVE-2024-27921

Vulnerability identifier: #VU87711

Vulnerability risk: High

CVSSv4.0: 8.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2024-27921

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Grav CMS
Web applications / CMS

Vendor: Grav CMS

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences. A remote attacker can send a specially crafted HTTP request and upload arbitrary files on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Grav CMS: 1.7.0 - 1.7.44

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External links
https://github.com/getgrav/grav/security/advisories/GHSA-m7hx-hw6h-mqmc
https://github.com/getgrav/grav/commit/5928411b86bab05afca2b33db4e7386a44858e99

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.