CVE-2021-37710

Workarounds

For older versions of 6.1, 6.2, and 6.3, corresponding security measures are also available via a plugin. For the full range of functions, we recommend updating to the latest Shopware version.

Cross-Site Scripting via SVG media files

Untrusted input is rendered as active markup in a victim's browser, which can run script in their session. Typical impact: session or credential theft, and actions taken as the user.

CVE-2021-37710 has a CVSS score of 8.0 (High). The vector is network-reachable, low privileges required, and user interaction required. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (6.4.3.1); upgrading removes the vulnerable code path.

Kodem intelligence

We recommend updating to the current version 6.4.3.1. You can get the update to 6.4.3.1 regularly via the Auto-Updater or directly via the download overview.

https://www.shopware.com/en/download/#shopware-6

1. What is CVE-2021-37710? CVE-2021-37710 is a high-severity cross-site scripting (XSS) vulnerability in shopware/core (composer), affecting versions <= 6.4.3.0. It is fixed in 6.4.3.1. Untrusted input is rendered as active markup in a victim's browser, which can run script in their session.
2. How severe is CVE-2021-37710? CVE-2021-37710 has a CVSS score of 8.0 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which packages are affected by CVE-2021-37710?
   • shopware/core (composer) (versions <= 6.4.3.0)
   • shopware/platform (composer) (versions <= 6.4.3.0)
4. Is there a fix for CVE-2021-37710? Yes. CVE-2021-37710 is fixed in 6.4.3.1. Upgrade to this version or later.
5. Is CVE-2021-37710 exploitable, and should I be worried? Whether CVE-2021-37710 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2021-37710 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2021-37710?
   • Upgrade shopware/core to 6.4.3.1 or later
   • Upgrade shopware/platform to 6.4.3.1 or later