Advisories for Composer/Getgrav/Grav package

A cross-site scripting (XSS) vulnerability in Grav v1.7.45 allows attackers to execute arbitrary web scripts or HTML via a crafted payload.

A low privilege user account with page edit privilege can read any server files using Twig Syntax. This includes Grav user account files - /grav/user/accounts/*.yaml. This file stores hashed user password, 2FA secret, and the password reset token. This can allow an adversary to compromise any registered account by resetting a password for a user to get access to the password reset token from the file or by cracking the …

Grav CMS is vulnerable to a Server-Side Template Injection (SSTI), which allows any authenticated user (editor permissions are sufficient) to execute arbitrary code on the remote server bypassing the existing security sandbox.

Due to the unrestricted access to twig extension class from grav context, an attacker can redefine the escape function and execute arbitrary commands.

Due to the unrestricted access to twig extension class from grav context, an attacker can redefine config variable. As a result, attacker can bypass previous patch.

Grav validates accessible functions through the Utils::isDangerousFunction function, but does not impose restrictions on twig functions like twig_array_map, allowing attackers to bypass the validation and execute arbitrary commands.

Grav is vulnerable to a file upload path traversal vulnerability, that can allow an adversary to replace or create files with extensions such as .json, .zip, .css, .gif, etc. This vulnerabiltiy can allow attackers to inject arbitrary code on the server, undermine integrity of backup files by overwriting existing backups or creating new ones, and exfiltrating sensitive data using CSS Injection exfiltration techniques.

Summary Due to insufficient permission verification, user who can write a page use frontmatter feature. Inadequate File Name Validation Details Insufficient Permission Verification In Grav CMS, "Frontmatter" refers to the metadata block located at the top of a Markdown file. Frontmatter serves the purpose of providing additional information about a specific page or post. In this feature, only administrators are granted access, while regular users who can create pages are …

A cross-site scripting (XSS) vulnerability in Grav versions 1.7.44 and before, allows remote authenticated attackers to execute arbitrary web scripts or HTML via the onmouseover attribute of an ISINDEX element.

Grav is a file-based Web-platform built in PHP. Grav is subject to a server side template injection (SSTI) vulnerability. The fix for another SSTI vulnerability using |map, |filter and |reduce twigs implemented in the commit 71bbed1 introduces bypass of the denylist due to incorrect return value from isDangerousFunction(), which allows to execute the payload prepending double backslash (\). The isDangerousFunction() check in version 1.7.42 and onwards retuns false value instead …

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, does 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 …

Grav is a file-based Web platform. 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 …

Grav is a file-based Web platform. 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 …

Grav is a flat-file content management system. Versions prior to 1.7.42 is 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.

Code Injection in GitHub repository getgrav/grav prior to 1.7.34.

stored xss in GitHub repository getgrav/grav prior to 1.7.33.

Cross-site Scripting (XSS) - Stored in GitHub repository getgrav/grav prior to 1.7.31.

Cross-site Scripting (XSS) - Stored in GitHub repository getgrav/grav prior to 1.7.31.

Cross-site Scripting (XSS) - Stored in Packagist getgrav/grav prior to 1.7.28.

Common/Grav.php in Grav before 1.7 has an Open Redirect. This is partially fixed in 1.6.23 and still present in 1.6.x.

grav is vulnerable to Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

grav is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

grav is vulnerable to Reliance on Cookies without Validation and Integrity Checking

Grav is a file based Web-platform. Twig processing of static pages can be enabled in the front matter by any administrative user allowed to create or edit pages. As the Twig processor runs unsandboxed, this behavior can be used to gain arbitrary code execution and elevate privileges on the instance. The issue was addressed in version 1.7.11.

The Backup functionality in Grav CMS allows an authenticated attacker to read arbitrary local files on the underlying server by exploiting a path-traversal technique. (This vulnerability can also be exploited by an unauthenticated attacker due to a lack of CSRF protection.`

The BackupDelete functionality in Grav CMS allows an authenticated attacker to delete arbitrary files on the underlying server by exploiting a path-traversal technique. (This vulnerability can also be exploited by an unauthenticated attacker due to a lack of CSRF protection.)

The Scheduler in Grav CMS allows an attacker to execute a system command by tricking an admin into visiting a malicious website (CSRF).

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in getgrav/grav.

Grav allows (Stored) Cross-Site Scripting due to JavaScript execution in SVG images.

Cross-site scripting (XSS) vulnerability in system/src/Grav/Common/Twig/Twig.php in Grav CMS allows remote attackers to inject arbitrary web script or HTML via the PATH_INFO to admin/tools.