security-review-owasp-browser-extension-vulnerabilities

To review a browser extension manifest for security risks, inspect requested permissions for excessive privilege and verify trust boundaries. This process detects privilege sprawl and exposed control paths in the manifest configuration before release.

Security checks for browser extension content scripts and background scripts must target weak isolation and messaging vulnerabilities. Analyzing these scripts identifies exposed control paths and verifies runtime assumptions using evidence-based detection.

Finding OWASP browser extension vulnerabilities during code review requires mapping extension architecture to OWASP concerns. This includes inspecting manifests, scripts, storage, messaging, and permissions for risky behavior and operational hardening gaps.

You can check browser extension permissions for privilege sprawl before deployment by reviewing the manifest and deployment flows. This detects excessive privilege and dependency trust issues across the extension's trust boundaries.

The best way to test browser extension messaging and storage for trust boundary issues is to perform a targeted security review. This inspects runtime assumptions and messaging paths to detect weak isolation and exposed surfaces.

Browser extension security reviews fail to catch deployment hardening gaps when they lack evidence-based detection of operational issues. Reviewing release controls and dependency trust within deployment flows resolves these operational blind spots.