← Vulnerability feed

Vulnerability record · CVE-2021-29440 · published 13 April 2021

CVE-2021-29440: Getgrav grav code injection vulnerability

Getgrav · Grav

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.

7.2 CVSS 3.1 High EPSS 31% · top 1.8% CWE-94 · Code injection
7.2CVSS 3.1 base score, v2 6.5
31%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://packetstormsecurity.com/files/162987/Grav-CMS-1.7.10-Server-Side-Template-Injection.html ExploitThird Party AdvisoryVDB Entry
https://blog.sonarsource.com/grav-cms-code-execution-vulnerabilities ExploitThird Party Advisory
https://github.com/getgrav/grav/security/advisories/GHSA-g8r4-p96j-xfxc Third Party Advisory
https://packagist.org/packages/getgrav/grav ProductThird Party Advisory
http://packetstormsecurity.com/files/162987/Grav-CMS-1.7.10-Server-Side-Template-Injection.html ExploitThird Party AdvisoryVDB Entry
https://blog.sonarsource.com/grav-cms-code-execution-vulnerabilities ExploitThird Party Advisory
https://github.com/getgrav/grav/security/advisories/GHSA-g8r4-p96j-xfxc Third Party Advisory
https://packagist.org/packages/getgrav/grav ProductThird Party Advisory

Track CVE-2021-29440 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.9CVE-2024-34082Getgrav grav improper privilege management vulnerabilityGrav is a file-based Web platform. Prior to version 1.7.46, a low privilege user account with page edit privilege can read any server files using Twi…EPSS 3.0%9.8CVE-2025-46199Getgrav grav cross-site scripting vulnerabilityCross Site Scripting vulnerability in grav v.1.7.48 and before allows an attacker to execute arbitrary code via a crafted script to the form fieldsEPSS 0.80%9.3CVE-2021-47812Getgrav grav missing authorization vulnerabilityGravCMS 1.10.7 contains an unauthenticated vulnerability that allows remote attackers to write arbitrary YAML configuration and execute PHP code thro…EPSS 2.2%9.1CVE-2025-66844Getgrav grav server-side request forgery (ssrf) vulnerabilityIn grav <1.7.49.5, a SSRF (Server-Side Request Forgery) vector may be triggered via Twig templates when page content is processed by Twig and the con…EPSS 0.29%8.9CVE-2026-42611Getgrav grav cross-site scripting vulnerabilityGrav is a file-based Web platform. Prior to 2.0.0-beta.2, a low-privileged (with the ability to create a page) user can cause XSS with the injection …EPSS 0.36%8.8CVE-2026-42608Getgrav grav path traversal vulnerabilityGrav is a file-based Web platform. Prior to 2.0.0-beta.2, there is a Path Traversal vulnerability within the FormFlash core component. By manipulatin…EPSS 0.52%8.8CVE-2025-66299Getgrav grav code injection vulnerabilityGrav 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 authenti…EPSS 0.60%8.8CVE-2025-66295Getgrav grav path traversal vulnerabilityGrav is a file-based Web platform. Prior to 1.8.0-beta.27, when a user with privilege of user creation creates a new user through the Admin UI and su…EPSS 0.55%

Source: NIST National Vulnerability Database (record CVE-2021-29440), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.