What is the CVSS score of CVE-2026-31822?

CVE-2026-31822 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Sylius are affected by CVE-2026-31822?

Organizations using Sylius should be aware of moderate risk from CVE-2026-31822, a cross-site scripting vulnerability rated CVSS 6.1.. A patch is available.

How to fix or mitigate CVE-2026-31822?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Sylius CVE-2026-31822

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-03-10 security-advisories@github.com

GHSA-vgh8-c6fp-7gcg

XSS Sylius

6.1

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

6.1 MEDIUM

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

CVE Published

Mar 10, 2026 - 22:16 nvd

MEDIUM 6.1

DescriptionGitHub Advisory

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.

AnalysisAI

Stored XSS in Sylius checkout login form allows unauthenticated attackers to inject malicious scripts through authentication error messages that are unsafely rendered via innerHTML. An attacker can craft a failed login attempt containing JavaScript payload that executes in the browser of any user viewing the checkout page, potentially stealing session tokens or credentials. The vulnerability affects Sylius versions prior to 2.0.16, 2.1.12, and 2.2.3, with no current patch available for older releases.

Technical ContextAI

Classified as CWE-79 (Cross-site Scripting (XSS)). Affects Sylius. 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.

RemediationAI

Monitor vendor advisories for a patch. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.