CVE-2021-41188 is a medium-severity (CVSS 5.7) Cross-site Scripting (XSS) vulnerability in shopware/shopware. O3 Security confirms whether CVE-2021-41188 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Authenticated Stored XSS in shopware/shopware
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 | 5.7.6 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for shopware/shopware. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
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
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether CVE-2021-41188 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to CVE-2021-41188. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2021-41188 in your dependencies?
O3 detects CVE-2021-41188 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.