High severity8.8NVD Advisory· Published Sep 30, 2026· Updated Sep 30, 2026

CVE-2026-103474

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.

Affected products

Yii Starter Kit/Yii2 Starter Kitreferences2 versions
(expand)+ 1 more
- (no CPE)
- (no CPE)range: <=4.2.0

Patches

Vulnerability mechanics

References

github.com/yii-starter-kit/yii2-starter-kit/blob/cc2c451e8c959c7300b04efea597706a38609f58/backend/modules/file/controllers/StorageController.phpnvd
github.com/yii-starter-kit/yii2-starter-kit/issues/797nvd
www.vulncheck.com/advisories/yii2-starter-kit-through-4.2.0-unrestricted-file-upload-rcenvd

News mentions

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