CVE-2021-32737
MEDIUMCVE-2021-32737 is a medium-severity (CVSS 4.8) Cross-site Scripting (XSS) vulnerability in sulu/sulu. O3 Security confirms whether CVE-2021-32737 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
XSS Injection in Media Collection Title was possible
Real-World Exposure
sulu/suluReal-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
Sulu is an open-source PHP content management system based on the Symfony framework. In versions of Sulu prior to 1.6.41, it is possible for a logged in admin user to add a script injection (cross-site-scripting) in the collection title. The problem is patched in version 1.6.41. As a workaround, one may manually patch the affected JavaScript files in lieu of updating.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | sulu/sulu | all versions | 1.6.41 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for sulu/sulu. 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 sulu/sulu to 1.6.41 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-32737 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-2021-32737 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-2021-32737. 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-2021-32737 in your dependencies?
O3 detects CVE-2021-32737 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.