CVE-2021-21425
Grav Admin Plugin Unauthenticated Controller Method Execution
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.
INFO
Published Date :
April 7, 2021, 7:15 p.m.
Last Modified :
Oct. 24, 2022, 8:56 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2021-21425 has a 11 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2021-21425
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-21425.
| URL | Resource |
|---|---|
| http://packetstormsecurity.com/files/162283/GravCMS-1.10.7-Remote-Command-Execution.html | Third Party Advisory VDB Entry |
| http://packetstormsecurity.com/files/162457/GravCMS-1.10.7-Remote-Command-Execution.html | Third Party Advisory VDB Entry |
| https://github.com/getgrav/grav-plugin-admin/security/advisories/GHSA-6f53-6qgv-39pj | Third Party Advisory |
| https://pentest.blog/unexpected-journey-7-gravcms-unauthenticated-arbitrary-yaml-write-update-leads-to-code-execution/ | Exploit Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
All CVE - PoC in GitHub
poc proofofconcept tester allcve cvegithub cvenew cvepoc cveupdate
None
None
None
None
None
It is a nmap script for GravCMS vulnerability (CVE-2021-21425)
Lua
None
GravCMS Unauthenticated Arbitrary YAML Write/Update leads to Code Execution (CVE-2021-21425)
Python
Automatic monitor github cve using Github Actions
Python
Good resources about web security that I have read.
bugbounty bugbounty-writeups bugbountytips web-security web-security-research tools hacking
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-21425 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-21425 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Reanalysis by [email protected]
Oct. 24, 2022
Action Type Old Value New Value Changed Reference Type http://packetstormsecurity.com/files/162457/GravCMS-1.10.7-Remote-Command-Execution.html Third Party Advisory http://packetstormsecurity.com/files/162457/GravCMS-1.10.7-Remote-Command-Execution.html Third Party Advisory, VDB Entry Removed CWE NIST CWE-862 Added CWE NIST NVD-CWE-Other -
Modified Analysis by [email protected]
May. 05, 2021
Action Type Old Value New Value Changed Reference Type http://packetstormsecurity.com/files/162283/GravCMS-1.10.7-Remote-Command-Execution.html No Types Assigned http://packetstormsecurity.com/files/162283/GravCMS-1.10.7-Remote-Command-Execution.html Third Party Advisory, VDB Entry Changed Reference Type http://packetstormsecurity.com/files/162457/GravCMS-1.10.7-Remote-Command-Execution.html No Types Assigned http://packetstormsecurity.com/files/162457/GravCMS-1.10.7-Remote-Command-Execution.html Third Party Advisory Added CWE NIST CWE-862 -
CVE Modified by [email protected]
May. 04, 2021
Action Type Old Value New Value Added Reference http://packetstormsecurity.com/files/162457/GravCMS-1.10.7-Remote-Command-Execution.html [No Types Assigned] -
CVE Modified by [email protected]
Apr. 21, 2021
Action Type Old Value New Value Added Reference http://packetstormsecurity.com/files/162283/GravCMS-1.10.7-Remote-Command-Execution.html [No Types Assigned] -
Initial Analysis by [email protected]
Apr. 20, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://github.com/getgrav/grav-plugin-admin/security/advisories/GHSA-6f53-6qgv-39pj No Types Assigned https://github.com/getgrav/grav-plugin-admin/security/advisories/GHSA-6f53-6qgv-39pj Third Party Advisory Changed Reference Type https://pentest.blog/unexpected-journey-7-gravcms-unauthenticated-arbitrary-yaml-write-update-leads-to-code-execution/ No Types Assigned https://pentest.blog/unexpected-journey-7-gravcms-unauthenticated-arbitrary-yaml-write-update-leads-to-code-execution/ Exploit, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:getgrav:grav-plugin-admin:*:*:*:*:*:*:*:* versions up to (excluding) 1.10.8
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-21425 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-21425
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
84.95 }} 2.55%
score
0.98588
percentile