EUVD-2025-200111
GHSA-gjc5-8cfh-653x
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Code injection prevention, sandbox exec
MITRE ATT&CK
2 techniques across 2 tactics: Execution, Initial Access The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | Complete system compromise — the attacker gains the ability to install malware, steal data, create backdoors, or pivot to other systems on the network. With a CVSS score of 8.8 (HIGH), this represents a significant risk. |
| Exploit ScenarioDerived | An attacker sends a specially crafted request to the vulnerable service that triggers code execution with the privileges of the running process. |
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Alert meAnalysisAIv1 – Mar 15, 2026
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 does not fully protect the Twig object, it is possible to interact with it (e.g., call methods, read/write attributes) through maliciously crafted Twig template directives injected into a web page. This allows an authenticated editor to add arbitrary functions to the Twig attribute system.twig.safe_filters, effectively bypassing the Grav CMS sandbox. This vulnerability is fixed in 1.8.0-beta.27.
Earlier versions of this analysis (1)
RemediationAI
A vendor patch is available — apply it immediately. Apply vendor patches immediately. Restrict network access to vulnerable services. Implement network segmentation and monitoring for anomalous activity.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 2 packages in composer, euvd
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Remote code execution allows an attacker to run arbitrary commands or code on the target system over a network without prior authentication. This vulnerability is classified as Code Injection (CWE-94).
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from Vendor (github) · only source for this CVE.
CVSS VectorVendor: github
Lifecycle Timeline
3Executive ViewAI
Grav CMS versions prior to 1.8.0-beta.27 contain a critical vulnerability allowing authenticated editors to execute arbitrary code on servers, effectively bypassing security protections. Organizations running affected Grav instances face immediate risk of data breach, system compromise, and operational disruption through insider threats or compromised editor accounts.
Apply vendor patch. If immediate patching is not feasible: (1) Restrict editor role assignments to only essential trusted personnel; (2) implement file integrity monitoring on Grav template directories; (3) deploy WAF rules to detect/block suspicious Twig directives in POST requests; (4) isolate affected Grav instances network-wide and monitor for unauthorized code execution indicators.
Threat Intelligence Overview
NVD
CVE.org
EPSS
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Code injection occurs when an application accepts user input and passes it directly into a language interpreter or evaluator without proper sanitization.
Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.
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Exploit-DB