CVE-2026-103476
yii2-starter-kit through 4.2.0 Unauthorized File Download via attachment-download
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
yii2-starter-kit through 4.2.0 fails to validate article publication status in the attachment-download endpoint, allowing unauthenticated attackers to download files from draft articles. Attackers can enumerate sequential attachment identifiers to retrieve files from unpublished articles without authentication or authorization checks.
| CWE | CWE-639 |
| Vendor | yii2-starter-kit |
| Product | yii2-starter-kit |
| Published | Sep 30, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected Versions
yii2-starter-kit / yii2-starter-kit
0 ≤ 4.2.0
References
github.com: https://github.com/yii-starter-kit/yii2-starter-kit/issues/797 github.com: https://github.com/yii-starter-kit/yii2-starter-kit github.com: https://github.com/yii-starter-kit/yii2-starter-kit/blob/cc2c451e8c959c7300b04efea597706a38609f58/frontend/controllers/ArticleController.php#L69 vulncheck.com: https://www.vulncheck.com/advisories/yii2-starter-kit-through-4.2.0-unauthorized-file-download-via-attachment-download
Credits
Vikash Gupta