Improper access control in Grav Admin Plugin
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-21425 |
| CWE-ID | CWE-284 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software Subscribe |
Grav Admin Plugin Web applications / Modules and components for CMS |
| Vendor | Grav CMS |
Security Bulletin
This security bulletin contains one high risk vulnerability.
1) Improper access control
EUVDB-ID: #VU52365
Risk: High
CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N/E:F/RL:O/RC:C]
CVE-ID: CVE-2021-21425
CWE-ID:
CWE-284 - Improper Access Control
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions. A remote attacker can execute some methods of administrator controller without needing any credentials, leading to arbitrary YAML file creation or content change of existing YAML files on the system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsGrav Admin Plugin: 1.9.13 - 1.10.7
External linkshttp://github.com/getgrav/grav-plugin-admin/security/advisories/GHSA-6f53-6qgv-39pj
http://pentest.blog/unexpected-journey-7-gravcms-unauthenticated-arbitrary-yaml-write-update-leads-to-code-execution/
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, a fully functional exploit for this vulnerability is available.
