Missing Authorization Affecting sylius/sylius package, versions >=2.0.0-alpha.1, <2.0.16>=2.1.0, <2.1.12>=2.2.0, <2.2.3
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-PHP-SYLIUSSYLIUS-15460796
- published11 Mar 2026
- disclosed11 Mar 2026
- creditUnknown
Introduced: 11 Mar 2026
CVE-2026-31821 (opens in a new tab)How to fix?
Upgrade sylius/sylius to version 2.0.16, 2.1.12, 2.2.3 or higher.
Overview
sylius/sylius is a platform for PHP, based on Symfony framework.
Affected versions of this package are vulnerable to Missing Authorization via the POST /api/v2/shop/orders/{tokenValue}/items endpoint. An attacker can gain unauthorized access to and manipulate another user's shopping cart by submitting requests with a known cart tokenValue, potentially exposing sensitive information such as customer email addresses, cart contents, address data, payment and shipment IDs, and order totals.
Workaround
This vulnerability can be mitigated by adding an ownership check in the handler responsible for adding items to the cart, ensuring the current user matches the cart owner before processing the request.