CVE-2025-43761
MEDIUMCVE-2025-43761 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in com.liferay:com.liferay.frontend.editor.ckeditor.web. O3 Security confirms whether CVE-2025-43761 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Liferay Portal Reflected XSS in CKeditor 4.21.0 endpoint
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, a proxy for how much of the ecosystem is exposed.
liferay-ckeditornpmDescription
A reflected cross-site scripting (XSS) vulnerability in the Liferay Portal 7.4.0 through 7.4.3.131, and Liferay DXP 2024.Q4.0 through 2024.Q4.4, 2024.Q3.1 through 2024.Q3.13, 2024.Q2.0 through 2024.Q2.13, 2024.Q1.1 through 2024.Q1.12 and 7.4 GA through update 92 allows an remote non-authenticated attacker to inject JavaScript into the frontend-editor-ckeditor-web/ckeditor/samples/old/ajax.html path
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | com.liferay:com.liferay.frontend.editor.ckeditor.web | all versions | 5.0.107 |
| ☕Maven | com.liferay:com.liferay.frontend.js.dependencies.web | all versions | 1.0.25 |
| 📦npm | liferay-ckeditor | all versions | 4.21.0-liferay.10 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for com.liferay:com.liferay.frontend.editor.ckeditor.web. 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 com.liferay:com.liferay.frontend.editor.ckeditor.web to 5.0.107 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-43761 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-2025-43761 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-2025-43761. 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-2025-43761 in your dependencies?
O3 detects CVE-2025-43761 across Maven, npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.