提出 #845906: kirilkirkov Ecommerce-CodeIgniter-Bootstrap master Path Traversal

## Description
Ecommerce-CodeIgniter-Bootstrap contains a path traversal vulnerability in vendor multi-image endpoints. The affected handlers trust the user-controlled `folder` parameter and concatenate it directly into filesystem paths under `attachments/shop_images/`.
Because the application did not canonicalize the target path or enforce a base directory boundary, an attacker able to reach the vendor image endpoints could traverse outside the intended product image directory. The vulnerable behavior allowed directory creation, image upload, and file deletion in unintended writable locations.

## Technical Details
- Affected component: `application/modules/vendor/controllers/AddProduct.php`
- Vulnerable parameter: `folder`
- Impacted operations: directory creation, multi-image upload, and image deletion outside the intended shop image directory
- Weakness: `CWE-22`
- CVSS v3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
- Severity: `Critical`
- Published: `2026-05-20`
- Patched version / fix commit: `2a9497ff11f36e573ad99e1c357ff0e6ded49745`
- GitHub Security Advisory: https://github.com/kirilkirkov/Ecommerce-CodeIgniter-Bootstrap/security/advisories/GHSA-6whv-r5hm-vcjr
- Vendor fix: https://github.com/kirilkirkov/Ecommerce-CodeIgniter-Bootstrap/commit/2a9497ff11f36e573ad99e1c357ff0e6ded49745

• ソース: ⚠️ https://github.com/kirilkirkov/Ecommerce-CodeIgniter-Bootstrap/security/advisories/GHSA-6whv-r5hm-vcjr
• ユーザー: Anonymous User
• 送信: 2026年06月02日 10:11 (1 月 ago)
• モデレーション: 2026年07月03日 19:24 (1 month later)
• ステータス: 承諾済み
• VulDBエントリ: 376150 [kirilkirkov Ecommerce-CodeIgniter-Bootstrap 迄 222ff31c06687b1c6d0e1ab63953f82c3674c52b Vendor Multi-Image Endpoint AddProduct.php folder ディレクトリトラバーサル]
• ポイント: 20