CVE-2021-41188 is a medium-severity (CVSS 5.7) Cross-site Scripting (XSS) vulnerability in shopware/shopware. A fix is available for shopware/shopware — see the affected versions and patch details below.
Authenticated Stored XSS in shopware/shopware
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
CVE-2021-41188 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.
Where this sits among everything scored
Of 385,386 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.
Real-World Exposure
shopware/shopwareReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.
Description
Impact
Authenticated Stored XSS in Administration
Patches
Use the Security Plugin: https://store.shopware.com/en/swag575294366635f/shopware-security-plugin.html
Workarounds
If you cannot use the security plugin, add the following config to your .htaccess file
<IfModule mod_headers.c>
<FilesMatch "\.(?i:svg)$">
Header set Content-Security-Policy "script-src 'none'"
</FilesMatch>
</IfModule>
If you are using nginx as server config, you can add the following to your configuration:
server {
# ...
location ~* ^.+\.svg$ {
add_header Content-Security-Policy "script-src 'none'";
}
}
References
https://docs.shopware.com/en/shopware-5-en/sicherheitsupdates/security-update-10-2021
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | shopware/shopware | all versions | 5.7.6composer require shopware/shopware:^5.7.6 |
Affected Products
shopwareshopwareDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for shopware/shopware, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update shopware/shopware to 5.7.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-41188 is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.
Frequently Asked Questions
Is CVE-2021-41188 in your dependencies?
Find it across Packagist, including transitive dependencies.