CVE-2026-25498Public exploitNetwork attack vector

Authenticated command execution via Yii2 behavior injection

Published Feb 9, 2026 · Updated Feb 9, 2026

Remote code execution in Craft CMS 4.0.0-RC1 through 4.16.17 and 5.0.0-RC1 through 5.8.21 allows remote authenticated users to run commands. Fields::assembleLayoutFromPost decodes the fieldLayout POST value and passes it to Craft::createObject without cleanseConfig, allowing an as-prefixed Yii2 behavior to invoke a configured command callback after validation. Administrator access to the control panel is required; successful exploitation executes arbitrary system commands with the web server process's privileges.

CVSS severity8.6
High
EPSS probability1.00%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Remote code execution in Craft CMS 4.0.0-RC1 through 4.16.17 and 5.0.0-RC1 through 5.8.21 allows remote authenticated users to run commands. Fields::assembleLayoutFromPost decodes the fieldLayout POST value and passes it to Craft::createObject without cleanseConfig, allowing an as-prefixed Yii2 behavior to invoke a configured command callback after validation. Administrator access to the control panel is required; successful exploitation executes arbitrary system commands with the web server process's privileges.

The record

CVE
CVE-2026-25498
Published
Feb 9, 2026
Updated
Feb 9, 2026
Vendor
Pixel & Tonic
Product
Craft CMS
Classifications
CWE-470, T1059
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Feb 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 4.0.0-RC1, < 4.16.18
  2. Affected versionversion=>= 5.0.0-RC1, < 5.8.22

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Pixel & Tonic · Craft CMSversion=>= 4.0.0-RC1, < 4.16.18; version=>= 5.0.0-RC1, < 5.8.22

Published CVSS scores

7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
8.6GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-470Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo