Craft Cms
CVE-2025-23209
HIGH
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 | High risk (CVSS 8.0, EPSS 19.1%). While requiring a compromised security key, keys are often exposed through .env file leaks, git repository exposure, or backup file disclosure. CISA KEV listing confirms active exploitation. |
| Exploit ScenarioDerived | An attacker discovers a Craft CMS security key through a leaked .env file or git repository. Using the key, they sign a malicious PHP payload and send it as a crafted request. The CMS validates the signature, trusts the payload, and executes the attacker's code. |
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Alert meAnalysisAIv1 – Mar 28, 2026
Craft CMS 4 and 5 contain a remote code execution vulnerability exploitable when the application's security key has been compromised, allowing attackers with the key to execute arbitrary code on the server.
Earlier versions of this analysis (1)
An RCE vulnerability in Craft CMS affects installations where the security key has been compromised, enabling attackers to inject and execute PHP code through crafted requests signed with the known key.
RemediationAI
Update Craft CMS. Rotate the security key immediately. Ensure .env files are not publicly accessible. Check git repositories for accidentally committed secrets.
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in composer
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
The CWE-94 code injection requires knowledge of the Craft CMS security key (used for signing cookies and tokens). With the key, attackers can craft signed payloads that the CMS trusts and processes, leading to PHP code execution.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
Lifecycle Timeline
3DescriptionGitHub Advisory
Craft is a flexible, user-friendly CMS for creating custom digital experiences on the web and beyond. This is an remote code execution (RCE) vulnerability that affects Craft 4 and 5 installs where your security key has already been compromised. Anyone running an unpatched version of Craft with a compromised security key is affected. This vulnerability has been patched in Craft 5.5.8 and 4.13.8. Users who cannot update to a patched version, should rotate their security keys and ensure their privacy to help migitgate the issue.
Executive ViewAI
Organizations using Craft face notable risk from CVE-2025-23209, a code injection vulnerability rated CVSS 8.0. Successful exploitation could allow attackers to execute arbitrary code or commands on affected systems, potentially leading to full system compromise. This vulnerability is actively exploited in the wild (KEV-listed) and requires immediate remediation. A patch is available and should be applied as part of regular vulnerability management.
Apply vendor patch. If immediate patching is not feasible: (1) Deploy WAF rules to block injection patterns; (2) Restrict network access to affected components; (3) Enable enhanced logging for suspicious activity.
Threat Intelligence Overview
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.
Affected Products (CPE)GitHub Advisory
Craft CMS versions 3.x through 5.x contain a critical remote code execution vulnerability (CVSS 10.0) that allows unauth
Craft CMS stores arbitrary content provided by unauthenticated users in session files. Rated medium severity (CVSS 6.9),
Craft CMS is a platform for creating digital experiences. Rated critical severity (CVSS 9.8), this vulnerability is remo
Craft is a flexible, user-friendly CMS for creating custom digital experiences on the web and beyond. Rated critical sev
Craft CMS up to v3.7.31 was discovered to contain a SQL injection vulnerability via the GraphQL API endpoint. Rated crit
The SEOmatic component before 3.3.0 for Craft CMS allows Server-Side Template Injection that leads to RCE via malformed
RCE in Craft CMS before 4.17.0-beta.1/5.9.0-beta.1 via template injection for authenticated admins. PoC and patch availa
Authenticated remote code execution in Craft CMS versions 5.0.0-RC1 through 5.8.20 and 4.0.0-RC1 through 4.16.16 lets an
SQL injection in Craft CMS 4.0.0-RC1 through 4.16.17 and 5.0.0-RC1 through 5.8.21 allows authenticated Control Panel use
An issue found in CraftCMS v.3.8.1 allows a remote attacker to execute arbitrary code via a crafted script to the Sectio
Craft CMS through 3.7.36 allows a remote unauthenticated attacker, who knows at least one valid username, to reset the a
Craft CMS 2.6.3000 allows remote attackers to execute arbitrary PHP code by using the "Assets->Upload files" screen and
GitHub PoC
Exploit-DB