CVE-2026-31821— Sylius is Missing Authorization in API v2 Add Item Endpoint
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I. Basic Information for CVE-2026-31821
Vulnerability Information
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Vulnerability Title
Sylius is Missing Authorization in API v2 Add Item Endpoint
Source: NVD (National Vulnerability Database)
Vulnerability Description
Sylius is an Open Source eCommerce Framework on Symfony. The POST /api/v2/shop/orders/{tokenValue}/items endpoint does not verify cart ownership. An unauthenticated attacker can add items to other registered customers' carts by knowing the cart tokenValue. An attacker who obtains a cart tokenValue can add arbitrary items to another customer's cart. The endpoint returns the full cart representation in the response (HTTP 201). The issue is fixed in versions: 2.0.16, 2.1.12, 2.2.3 and above.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制缺失
Source: NVD (National Vulnerability Database)
Vulnerability Title
Sylius 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Sylius是波兰Sylius公司的一套基于Symfony框架的开源电子商务平台。 Sylius存在安全漏洞，该漏洞源于POST /api/v2/shop/orders/{tokenValue}/items端点未验证购物车所有权，可能导致未经验证的攻击者向其他客户的购物车添加商品。以下版本受到影响：2.0.16之前版本、2.1.12之前版本和2.2.3之前版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-31821
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Same Patch Batch · Sylius · 2026-03-10 · 7 CVEs total
| CVE-2026-31824 | 8.2 HIGH | Sylius has a Promotion Usage Limit Bypass via Race Condition |
| CVE-2026-31825 | 5.3 MEDIUM | Sylius has a DQL Injection via API Order Filters |
| CVE-2026-31823 | 4.8 MEDIUM | Sylius has Authenticated Stored XSS |
| CVE-2026-31819 | Sylius has an Open Redirect via Referer Header | |
| CVE-2026-31822 | Sylius has a XSS vulnerability in checkout login form | |
| CVE-2026-31820 | Sylius affected by IDOR in Cart and Checkout LiveComponents |
IV. Related Vulnerabilities
Same product: Sylius
- CVE-2026-31825
Sylius has a DQL Injection via API Order Filters - CVE-2026-31824
Sylius has a Promotion Usage Limit Bypass via Race Condition - CVE-2026-31823
Sylius has Authenticated Stored XSS - CVE-2026-31822
Sylius has a XSS vulnerability in checkout login form - CVE-2026-31820
Sylius affected by IDOR in Cart and Checkout LiveComponents
Same vendor: Sylius
- CVE-2026-31825
Sylius has a DQL Injection via API Order Filters - CVE-2026-31824
Sylius has a Promotion Usage Limit Bypass via Race Condition - CVE-2026-31823
Sylius has Authenticated Stored XSS - CVE-2026-31822
Sylius has a XSS vulnerability in checkout login form - CVE-2026-31820
Sylius affected by IDOR in Cart and Checkout LiveComponents
Same weakness: CWE-862
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Argo Workflows Is Missing Authorization in Sync ConfigMap Pr - CVE-2026-42174
Kirby: User avatar creation, replacement and deletion are no - CVE-2026-42137
Kirby: `pages.access/list` and `files.access/list` permissio
V. Comments for CVE-2026-31821
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