Vulnerability Description
Grav Admin Plugin is an HTML user interface that provides a way to configure Grav and create and modify pages. In versions 1.10.7 and earlier, an unauthenticated user can execute some methods of administrator controller without needing any credentials. Particular method execution will result in arbitrary YAML file creation or content change of existing YAML files on the system. Successfully exploitation of that vulnerability results in configuration changes, such as general site information change, custom scheduler job definition, etc. Due to the nature of the vulnerability, an adversary can change some part of the webpage, or hijack an administrator account, or execute operating system command under the context of the web-server user. This vulnerability is fixed in version 1.10.8. Blocking access to the `/admin` path from untrusted sources can be applied as a workaround.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Getgrav | Grav-Plugin-Admin | < 1.10.8 |
Related Weaknesses (CWE)
References
- http://packetstormsecurity.com/files/162283/GravCMS-1.10.7-Remote-Command-ExecutThird Party AdvisoryVDB Entry
- http://packetstormsecurity.com/files/162457/GravCMS-1.10.7-Remote-Command-ExecutThird Party AdvisoryVDB Entry
- https://github.com/getgrav/grav-plugin-admin/security/advisories/GHSA-6f53-6qgv-Third Party Advisory
- https://pentest.blog/unexpected-journey-7-gravcms-unauthenticated-arbitrary-yamlExploitThird Party Advisory
- http://packetstormsecurity.com/files/162283/GravCMS-1.10.7-Remote-Command-ExecutThird Party AdvisoryVDB Entry
- http://packetstormsecurity.com/files/162457/GravCMS-1.10.7-Remote-Command-ExecutThird Party AdvisoryVDB Entry
- https://github.com/getgrav/grav-plugin-admin/security/advisories/GHSA-6f53-6qgv-Third Party Advisory
- https://pentest.blog/unexpected-journey-7-gravcms-unauthenticated-arbitrary-yamlExploitThird Party Advisory
FAQ
What is CVE-2021-21425?
CVE-2021-21425 is a vulnerability with a CVSS score of 9.3 (CRITICAL). Grav Admin Plugin is an HTML user interface that provides a way to configure Grav and create and modify pages. In versions 1.10.7 and earlier, an unauthenticated user can execute some methods of admin...
How severe is CVE-2021-21425?
CVE-2021-21425 has been rated CRITICAL with a CVSS base score of 9.3/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2021-21425?
Check the references section above for vendor advisories and patch information. Affected products include: Getgrav Grav-Plugin-Admin.