JS Vulnerability Scanner
Detect vulnerable front-end JavaScript libraries with Lighthouse.
Powered by Geekflare Lighthouse API
What Is a JS Vulnerability Scanner?
JavaScript Vulnerability Scanner checks a web page for known vulnerable front-end JavaScript libraries using Google Lighthouse.
What the Tool Checks
| Check | Why It Matters |
|---|---|
| Detected libraries | Shows JavaScript libraries Lighthouse can identify on the page, including reported versions. |
| Known vulnerable libraries | Flags libraries with known security issues reported by Lighthouse. |
| Severity | Highlights the highest reported severity so risky updates can be prioritized. |
| Advisory links | Links to vulnerability details when Lighthouse includes a reference URL. |
If the result is Passed, Lighthouse did not report vulnerable JavaScript libraries for the tested page.
If the result is Review or High Risk, update the affected JavaScript library, remove it if it is unused, or replace the dependency with a maintained alternative. After deploying the fix, rerun the scan to confirm the exposed page no longer uses the vulnerable version.
This scanner checks libraries visible from the rendered page. It does not inspect private backend dependencies, package lockfiles, or libraries that are not loaded in the tested page.
Frequently Asked Questions
The scanner runs a focused Lighthouse check for detected JavaScript libraries and the no-vulnerable-libraries audit, then reports any known vulnerable front-end libraries found on the page.
No. This tool checks JavaScript libraries visible to the page at runtime. It does not inspect private server-side packages, lockfiles, or build-time dependencies.
Upgrade the affected JavaScript package, remove unused libraries, or replace abandoned third-party scripts with maintained alternatives. Retest after deployment to confirm the page no longer exposes the vulnerable version.