Sylius up to 2.0.15/2.1.11/2.2.2 Message cross site scripting

Summaryinfo

A vulnerability was found in Sylius up to 2.0.15/2.1.11/2.2.2. It has been declared as problematic. This impacts an unknown function of the component Message Handler. Such manipulation leads to cross site scripting. This vulnerability is documented as CVE-2026-31822. The attack can be executed remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Sylius up to 2.0.15/2.1.11/2.2.2. It has been rated as problematic. Affected by this issue is some unknown processing of the component Message Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. CVE summarizes:

Sylius is an Open Source eCommerce Framework on Symfony. A cross-site scripting (XSS) vulnerability exists in the shop checkout login form handled by the ApiLoginController Stimulus controller. When a login attempt fails, AuthenticationFailureHandler returns a JSON response whose message field is rendered into the DOM using innerHTML, allowing any HTML or JavaScript in that value to be parsed and executed by the browser. The issue is fixed in versions: 2.0.16, 2.1.12, 2.2.3 and above.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-31822 since 03/09/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading to version 2.0.16, 2.1.12 or 2.2.3 eliminates this vulnerability.

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Productinfo

Name

• Sylius

Version

• 2.0.0
• 2.0.1
• 2.0.2
• 2.0.3
• 2.0.4
• 2.0.5
• 2.0.6
• 2.0.7
• 2.0.8
• 2.0.9
• 2.0.10
• 2.0.11
• 2.0.12
• 2.0.13
• 2.0.14
• 2.0.15
• 2.1.0
• 2.1.1
• 2.1.2
• 2.1.3
• 2.1.4
• 2.1.5
• 2.1.6
• 2.1.7
• 2.1.8
• 2.1.9
• 2.1.10
• 2.1.11
• 2.2.0
• 2.2.1
• 2.2.2

Website

• Product: https://github.com/Sylius/Sylius/

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CPE 2.2info

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