CVE-2026-103476
yii2-starter-kit through 4.2.0 Unauthorized File Download via attachment-download
- State
- Published
- Severity
- 6.9 Medium
- Published
- Sep 30, 2026
- Updated
- Oct 1, 2026
- Reserved
- Sep 30, 2026
Description
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 Attackers can enumerate sequential attachment identifiers to retrieve files from unpublished articles without authentication or authorization checks.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N | VulnCheck |
Weaknesses
- CWE-639 Authorization Bypass Through User-Controlled Key
Affected Products
| Product | Versions |
|---|---|
yii2-starter-kityii2-starter-kit |
|
References
- GitHub Issue #797issue-tracking
- https://github.com/yii-starter-kit/yii2-starter-kitproduct
- https://github.com/yii-starter-kit/yii2-starter-kit/blob/cc2c451e8c959c7300b04efea597706a38609f58/frontend/controllers/ArticleController.php#L69technical-description
- VulnCheck Advisory: yii2-starter-kit through 4.2.0 Unauthorized File Download via attachment-downloadthird-party-advisory
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