Duplicate Advisory: Craft CMS: Authenticated RCE via `condition.config` JSON cleanse bypass
## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-265m-7826-wjqm. This link is maintained to preserve external references. ## Original Description Craft CMS versions from 4.0.0-RC1 before 4.18.2 and from 5.0.0-RC1 before 5.10.6 contain an authenticated remote code execution vulnerability in the control panel element-search condition handling. Craft cleanses the outer request-controlled condition array via Component::cleanseConfig(), but Conditions::createCondition() later decodes and merges the JSON string in condition.config without re-running cleanseConfig() on the decoded configuration. Because condition.config is a JSON string during the first cleanse, Yii special config keys such as 'as ...' and 'on ...' can be hidden inside it and, after JSON decoding, are interpreted by Yii as behavior/event configuration during FieldLayout object creation. An attacker with an authenticated control panel session (and a valid CSRF token) can exploit this to execute operating system commands as the PHP/web user.
Duplicate Advisory: Craft CMS: Authenticated RCE via `condition.config` JSON cleanse bypass
Description
## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-265m-7826-wjqm. This link is maintained to preserve external references. ## Original Description Craft CMS versions from 4.0.0-RC1 before 4.18.2 and from 5.0.0-RC1 before 5.10.6 contain an authenticated remote code execution vulnerability in the control panel element-search condition handling. Craft cleanses the outer request-controlled condition array via Component::cleanseConfig(), but Conditions::createCondition() later decodes and merges the JSON string in condition.config without re-running cleanseConfig() on the decoded configuration. Because condition.config is a JSON string during the first cleanse, Yii special config keys such as 'as ...' and 'on ...' can be hidden inside it and, after JSON decoding, are interpreted by Yii as behavior/event configuration during FieldLayout object creation. An attacker with an authenticated control panel session (and a valid CSRF token) can exploit this to execute operating system commands as the PHP/web user.
CVSS v3.1
Score 8.8high
Affected software
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Weaknesses
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-w36c-qxrq-v7fw
- Osv Schema Version
- 1.4.0
- Aliases
- []
- Ecosystems
- ["Packagist"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a9845c7acd9273b496affbb
Added to database: 09/02/2026, 15:50:31 UTC
Last updated: 09/02/2026, 22:12:45 UTC
Views: 6
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