yii2-starter-kit through 4.2.0 fails to validate file types in the backend storage upload actions, allowing authenticated managers to upload PHP files. Attackers with manager role can upload PHP scripts to the web-accessible storage directory and request them to execute arbitrary code on the server.

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Fixes

Solution

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Workaround

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History

Wed, 30 Sep 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 30 Sep 2026 17:45:00 +0000

Type Values Removed Values Added
Description yii2-starter-kit through 4.2.0 fails to validate file types in the backend storage upload actions, allowing authenticated managers to upload PHP files. Attackers with manager role can upload PHP scripts to the web-accessible storage directory and request them to execute arbitrary code on the server.
Title yii2-starter-kit through 4.2.0 Unrestricted File Upload RCE
Weaknesses CWE-434
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-30T17:50:39.433Z

Reserved: 2026-09-30T16:03:00.349Z

Link: CVE-2026-103474

cve-icon Vulnrichment

Updated: 2026-09-30T17:50:29.092Z

cve-icon NVD

Status : Received

Published: 2026-09-30T18:18:17.647

Modified: 2026-09-30T18:18:17.647

Link: CVE-2026-103474

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses