CVE-2020-13672
MEDIUMCVE-2020-13672 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in drupal/core. O3 Security confirms whether CVE-2020-13672 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Drupal core Cross-site Scripting (XSS) vulnerability
Real-World Exposure
drupal/core🐘drupal/core🐘drupal/core🐘drupal/core🐘drupal/drupal🐘drupal/drupal🐘drupal/drupal🐘drupal/drupalReal-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
Cross-site Scripting (XSS) vulnerability in Drupal core's sanitization API fails to properly filter cross-site scripting under certain circumstances. This issue affects: Drupal Core 9.1.x versions prior to 9.1.7; 9.0.x versions prior to 9.0.12; 8.9.x versions prior to 8.9.14; 7.x versions prior to 7.80.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | drupal/core | ≥ 7.0.0&&< 7.80 | 7.80 |
| 🐘Packagist | drupal/core | ≥ 8.0.0&&< 8.9.14 | 8.9.14 |
| 🐘Packagist | drupal/core | ≥ 9.0.0&&< 9.0.12 | 9.0.12 |
| 🐘Packagist | drupal/core | ≥ 9.1.0&&< 9.1.7 | 9.1.7 |
| 🐘Packagist | drupal/drupal | ≥ 7.0.0&&< 7.80 | 7.80 |
| 🐘Packagist | drupal/drupal | ≥ 8.0.0&&< 8.9.14 | 8.9.14 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for drupal/core. 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 drupal/core to 7.80 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2020-13672 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-2020-13672 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-2020-13672. 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-2020-13672 in your dependencies?
O3 detects CVE-2020-13672 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.