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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.0005.

Exploitation poc

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Sylius Sylius affected
Version Status Constraints
>= 2.2.0, < 2.2.3 affected —
>= 2.1.0, < 2.1.12 affected —
>= 2.0.0, < 2.0.16 affected —

No data.

No data.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-wjmg-4cq5-m8hg Sylius is Missing Authorization in API v2 Add Item Endpoint
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/Sylius/Sylius/security/advisories/GHSA-wjmg-4cq5-m8hg cve-icon cve-icon
History

Wed, 11 Mar 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 11 Mar 2026 12:00:00 +0000

Type Values Removed Values Added
First Time appeared Sylius
Sylius sylius
Vendors & Products Sylius
Sylius sylius

Tue, 10 Mar 2026 21:45:00 +0000

Type Values Removed Values Added
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.
Title Sylius is Missing Authorization in API v2 Add Item Endpoint
Weaknesses CWE-862
References
Metrics cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-11T15:19:28.880Z

Reserved: 2026-03-09T17:41:56.076Z

Link: CVE-2026-31821

cve-icon Vulnrichment

Updated: 2026-03-11T15:09:18.926Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-10T22:16:19.653

Modified: 2026-03-11T13:52:47.683

Link: CVE-2026-31821

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-03-11T11:39:22Z

Weaknesses