Grav server-side template injection vulnerability (CNVD-2025-30352)

Grav is an extensible CMS Content Management System for personal blogs, small content publishing platforms and one-page product presentations. Grav suffers from a server-side template injection vulnerability that stems from insufficient regular expression validation of the cleanDangerousTwig...

Grav Code Execution Vulnerability

Grav is an extensible CMS Content Management System for personal blogs, small content publishing platforms and one-page product presentations. Grav suffers from a code execution vulnerability that stems from malicious Twig expression injection, which can be exploited by an attacker to cause...

CVE-2025-66299

Grav is a file-based Web platform. Prior to 1.8.0-beta.27, Grav CMS is vulnerable to a Server-Side Template Injection SSTI that allows any authenticated user with editor permissions to execute arbitrary code on the remote server, bypassing the existing security sandbox. Since the security sandbox...

CVE-2025-66297

Grav is a file-based Web platform. Prior to 1.8.0-beta.27, a user with admin panel access and permissions to create or edit pages in Grav CMS can enable Twig processing in the page frontmatter. By injecting malicious Twig expressions, the user can escalate their privileges to admin or execute...

Grav is vulnerable to RCE via SSTI through Twig Sandbox Bypass

Summary A Server-Side Template Injection SSTI vulnerability exists in Grav that allows authenticated attackers with editor permissions to execute arbitrary commands on the server and, under certain conditions, may also be exploited by unauthenticated attackers. This vulnerability stems from weak...

GHSA-662M-56V4-3R8F Grav is vulnerable to RCE via SSTI through Twig Sandbox Bypass

Summary A Server-Side Template Injection SSTI vulnerability exists in Grav that allows authenticated attackers with editor permissions to execute arbitrary commands on the server and, under certain conditions, may also be exploited by unauthenticated attackers. This vulnerability stems from weak...

EUVD-2025-200078

Grav vulnerable to Privilege Escalation and Authenticated Remote Code Execution via Twig Injection...

GHSA-858Q-77WX-HHX6 Grav vulnerable to Privilege Escalation and Authenticated Remote Code Execution via Twig Injection

Summary A user with admin panel access and permissions to create or edit pages in Grav CMS can enable Twig processing in the page frontmatter. By injecting malicious Twig expressions, the user can escalate their privileges to admin or execute arbitrary system commands via the scheduler API. This...

Grav vulnerable to Privilege Escalation and Authenticated Remote Code Execution via Twig Injection

Summary A user with admin panel access and permissions to create or edit pages in Grav CMS can enable Twig processing in the page frontmatter. By injecting malicious Twig expressions, the user can escalate their privileges to admin or execute arbitrary system commands via the scheduler API. This...

Grav has Broken Access Control which allows an Editor to modify the page's YAML Frontmatter to alter form processing actions

Summary Due to a broken access control vulnerability in the /admin/pages/pagename endpoint, an editor user with full permissions to pages can change the functionality of a form after submission. Details Due to improper authorization checks when modifying critical fields on a POST request to...

GHSA-GJC5-8CFH-653X Grav is Vulnerable to Security Sandbox Bypass with SSTI (Server Side Template Injection)

Summary Grav CMS is vulnerable to a Server-Side Template Injection SSTI that allows any authenticated user with editor permissions to execute arbitrary code on the remote server, bypassing the existing security sandbox. Details Grav CMS uses a custom sandbox to protect the powerful Twig methods...

EUVD-2025-200111

Grav is Vulnerable to Security Sandbox Bypass with SSTI Server Side Template Injection...

Grav is Vulnerable to Security Sandbox Bypass with SSTI (Server Side Template Injection)

Summary Grav CMS is vulnerable to a Server-Side Template Injection SSTI that allows any authenticated user with editor permissions to execute arbitrary code on the remote server, bypassing the existing security sandbox. Details Grav CMS uses a custom sandbox to protect the powerful Twig methods...

CVE-2025-66299

Grav is a file-based Web platform. Prior to 1.8.0-beta.27, Grav CMS is vulnerable to a Server-Side Template Injection SSTI that allows any authenticated user with editor permissions to execute arbitrary code on the remote server, bypassing the existing security sandbox. Since the security sandbox...

Arbitrary Code Injection

Overview getgrav/grav is a Modern, Crazy Fast, Ridiculously Easy and Amazingly Powerful Flat-File CMS. Affected versions of this package are vulnerable to Arbitrary Code Injection via the Twig object when maliciously crafted template directives are injected into a web page. An attacker can execut...

Arbitrary Code Injection

Overview getgrav/grav is a Modern, Crazy Fast, Ridiculously Easy and Amazingly Powerful Flat-File CMS. Affected versions of this package are vulnerable to Arbitrary Code Injection via insufficient validation in the cleanDangerousTwig function. An attacker can execute arbitrary commands on the...

Improper Neutralization of Special Elements Used in a Template Engine

Overview getgrav/grav is a Modern, Crazy Fast, Ridiculously Easy and Amazingly Powerful Flat-File CMS. Affected versions of this package are vulnerable to Improper Neutralization of Special Elements Used in a Template Engine via the Twig processing feature enabled through page frontmatter. An...

CVE-2025-66297

Grav is a file-based Web platform. Prior to 1.8.0-beta.27, a user with admin panel access and permissions to create or edit pages in Grav CMS can enable Twig processing in the page frontmatter. By injecting malicious Twig expressions, the user can escalate their privileges to admin or execute...

CVE-2025-66294

Grav is a file-based Web platform. Prior to 1.8.0-beta.27, a Server-Side Template Injection SSTI vulnerability exists in Grav that allows authenticated attackers with editor permissions to execute arbitrary commands on the server and, under certain conditions, may also be exploited by...

CVE-2025-66299

Grav CMS is vulnerable to a Server-Side Template Injection (SSTI) that lets an authenticated editor execute arbitrary code on the server by abusing the Twig sandbox, bypassing restrictions via crafted Twig directives to modify system.twig.safe_filters. The issue exists prior to Grav 1.8.0-beta.27...