CVE-2024-12393 is a medium-severity (CVSS 5.4) Cross-site Scripting (XSS) vulnerability in drupal/core. A fix is available for drupal/core — see the affected versions and patch details below.
Drupal core - Moderately critical - Cross Site Scripting - SA-CORE-2024-003
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2024-12393.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
CVE-2024-12393 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 378,567 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
drupal/core🐘drupal/core🐘drupal/core🐘drupal/core-recommended🐘drupal/core-recommended🐘drupal/core-recommended🐘drupal/drupal🐘drupal/drupal+1 moreReal-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
Drupal uses JavaScript to render status messages in some cases and configurations. In certain situations, the status messages are not adequately sanitized. This issue affects Drupal Core: from 8.8.0 before 10.2.11, from 10.3.0 before 10.3.9, from 11.0.0 before 11.0.8.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | drupal/core | ≥ 8.8.0&&< 10.2.11 | 10.2.11composer require drupal/core:^10.2.11 |
| 🐘Packagist | drupal/core | ≥ 10.3.0&&< 10.3.9 | 10.3.9composer require drupal/core:^10.3.9 |
| 🐘Packagist | drupal/core | ≥ 11.0.0&&< 11.0.8 | 11.0.8composer require drupal/core:^11.0.8 |
| 🐘Packagist | drupal/core-recommended | ≥ 8.8.0&&< 10.2.11 | 10.2.11composer require drupal/core-recommended:^10.2.11 |
| 🐘Packagist | drupal/core-recommended | ≥ 10.3.0&&< 10.3.9 | 10.3.9composer require drupal/core-recommended:^10.3.9 |
| 🐘Packagist | drupal/core-recommended | ≥ 11.0.0&&< 11.0.8 | 11.0.8composer require drupal/core-recommended:^11.0.8 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for drupal/core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update drupal/core to 10.2.11 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2024-12393 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 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2024-12393 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2024-12393. 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-2024-12393 in your dependencies?
O3 Security finds CVE-2024-12393 across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.