GHSA-v27h-j97p-wqmx
Fix: ckeditor/ckeditor4@b685874GHSA-v27h-j97p-wqmx is a Cross-site Scripting (XSS) vulnerability in ckeditor/ckeditor. O3 Security confirms whether GHSA-v27h-j97p-wqmx is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
The Preview plugin in CKEditor allows Cross-site scripting (XSS)
Real-World Exposure
ckeditor/ckeditorReal-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 the Preview plugin before 4.4.3 in CKEditor allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | ckeditor/ckeditor | all versions | 4.4.3 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for ckeditor/ckeditor. 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 ckeditor/ckeditor to 4.4.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-v27h-j97p-wqmx 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 GHSA-v27h-j97p-wqmx 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 GHSA-v27h-j97p-wqmx. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-v27h-j97p-wqmx in your dependencies?
O3 detects GHSA-v27h-j97p-wqmx across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.