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Vulnerability record · CVE-2020-5218 · published 27 January 2020

CVE-2020-5218: Sylius http request smuggling vulnerability

Sylius · Sylius

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.

4.3 CVSS 3.1 Medium EPSS 0.60% · top 53.2% CWE-444 · HTTP request smuggling
4.3CVSS 3.1 base score, v2 4.0
0.60%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-5218), CISA KEV, FIRST EPSS (scores of 2026-10-08). This page is refreshed as NVD updates the record.