Craft Cms
CVE-2026-28695
HIGH
GHSA-94rc-cqvm-m4pw
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessAuthenticate as admin user
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ExploitInject malicious Twig template with create() function
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ExecutionInstantiate Symfony Process gadget chain
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ImpactExecute arbitrary system commands as web server user
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V1 - Encoding and Sanitization Template injection prevention
|
| Exploitation Conditions | Authenticated admin account required on Craft CMS 5.8.21. Attacker must have admin panel access to inject Twig templates through vulnerable create() function. Default Craft CMS installations with symfony/process dependency bundled. |
| Impact | CVSS 7.2 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: High. User interaction: None. Exploitation requires authentication. Public exploit/POC available. |
| Exploit ScenarioDerived | An attacker (requires authentication) could exploit this vulnerability to compromise the affected system. |
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Alert meAnalysisAIv1 – Mar 12, 2026
Remote code execution in Craft CMS 5.8.21 allows authenticated administrators to execute arbitrary PHP code through Server-Side Template Injection in the create() Twig function combined with Symfony Process gadget chains. Public exploit code exists for this vulnerability, which bypasses the previous patch for CVE-2025-57811. Updates are available in Craft CMS 5.9.0-beta.1 and 4.17.0-beta.1.
Earlier versions of this analysis (1)
Craft is a content management system (CMS). There is an authenticated admin RCE in Craft CMS 5.8.21 via Server-Side Template Injection using the create() Twig function combined with a Symfony Process gadget chain. [CVSS 7.2 HIGH]
RemediationAI
A vendor patch is available — apply it immediately. Fixed in version 5.8.7. Restrict network access to the affected service where possible.
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
Affects Craft Cms. Craft is a content management system (CMS). There is an authenticated admin RCE in Craft CMS 5.8.21 via Server-Side Template Injection using the create() Twig function combined with a Symfony Process gadget chain. The create() Twig function exposes Craft::createObject(), which allows instantiation of arbitrary PHP classes with constructor arguments. Combined with the bundled symfony/process dependency, this enables RCE. This bypasses the fix implemented for CVE-2025-57811 (patched in 5.8.7). Thi
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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:H/UI:N/S:U/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 content management system (CMS). There is an authenticated admin RCE in Craft CMS 5.8.21 via Server-Side Template Injection using the create() Twig function combined with a Symfony Process gadget chain. The create() Twig function exposes Craft::createObject(), which allows instantiation of arbitrary PHP classes with constructor arguments. Combined with the bundled symfony/process dependency, this enables RCE. This bypasses the fix implemented for CVE-2025-57811 (patched in 5.8.7). This vulnerability is fixed in 5.9.0-beta.1 and 4.17.0-beta.1.
Executive ViewAI
Craft CMS installations running version 5.8.21 are vulnerable to remote code execution attacks by authenticated administrators, allowing attackers with admin access to execute arbitrary commands on affected servers. Organizations using Craft CMS must immediately patch or restrict admin access, as public exploit code is available and threat actors actively seek vulnerable systems.
Apply vendor patch. If immediate patching is not possible: (1) Restrict admin panel access via firewall rules to known administrative IP addresses only; (2) Disable Twig template functionality if not required; (3) Monitor admin logs for suspicious create() function calls; (4) Implement Web Application Firewall rules to block Server-Side Template Injection payloads; (5) Audit all current admin accounts for unauthorized or dormant users.
Threat Intelligence Overview
NVD
CVE.org
EPSS
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
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
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