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.
CVSS Score
8.8
EPSS Score
0.018
Published
2023-06-14
Grav is a flat-file content management system. Prior to version 1.7.42, the patch for CVE-2022-2073, a server-side template injection vulnerability in Grav leveraging the default `filter()` function, did not block other built-in functions exposed by Twig's Core Extension that could be used to invoke arbitrary unsafe functions, thereby allowing for remote code execution. A patch in version 1.74.2 overrides the built-in Twig `map()` and `reduce()` filter functions in `system/src/Grav/Common/Twig/Extension/GravExtension.php` to validate the argument passed to the filter in `$arrow`.
CVSS Score
8.8
EPSS Score
0.077
Published
2023-06-14
Grav is a flat-file content management system. In versions 1.7.42 and prior, the "/forgot_password" page has a self-reflected cross-site scripting vulnerability that can be exploited by injecting a script into the "email" parameter of the request. While this vulnerability can potentially allow an attacker to execute arbitrary code on the user's browser, the impact is limited as it requires user interaction to trigger the vulnerability. As of time of publication, a patch is not available. Server-side validation should be implemented to prevent this vulnerability.
CVSS Score
5.4
EPSS Score
0.008
Published
2023-06-14
Grav is a flat-file content management system. Versions prior to 1.7.42 are vulnerable to server side template injection. Remote code execution is possible by embedding malicious PHP code on the administrator screen by a user with page editing privileges. Version 1.7.42 contains a fix for this issue.
CVSS Score
9.9
EPSS Score
0.03
Published
2023-06-14
Grav is a flat-file content management system. Prior to version 1.7.42, there is a logic flaw in the `GravExtension.filterFilter()` function whereby validation against a denylist of unsafe functions is only performed when the argument passed to filter is a string. However, passing an array as a callable argument allows the validation check to be skipped. 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. The vulnerability can be found in the `GravExtension.filterFilter()` function declared in `/system/src/Grav/Common/Twig/Extension/GravExtension.php`. Version 1.7.42 contains a patch for this issue. End users should also ensure that `twig.undefined_functions` and `twig.undefined_filters` properties in `/path/to/webroot/system/config/system.yaml` configuration file are set to `false` to disallow Twig from treating undefined filters/functions as PHP functions and executing them.
CVSS Score
8.8
EPSS Score
0.004
Published
2023-06-14
Code Injection in GitHub repository getgrav/grav prior to 1.7.34.
CVSS Score
9.1
EPSS Score
0.002
Published
2022-06-29
stored xss in GitHub repository getgrav/grav prior to 1.7.33.
CVSS Score
8.2
EPSS Score
0.003
Published
2022-04-26
Cross-site Scripting (XSS) - Stored in GitHub repository getgrav/grav prior to 1.7.31.
CVSS Score
7.1
EPSS Score
0.003
Published
2022-03-15
Cross-site Scripting (XSS) - Stored in GitHub repository getgrav/grav prior to 1.7.31.
CVSS Score
4.6
EPSS Score
0.002
Published
2022-02-28
Cross-site Scripting (XSS) - Stored in Packagist getgrav/grav prior to 1.7.28.
CVSS Score
5.7
EPSS Score
0.002
Published
2022-01-25