Security context

What an agent needs to avoid regressing past fixes and find the next vuln in this repo.

vaadin/flow

              main @ 3074b26
            

Fixes

CVEs

HIGH

Peak severity

62.5%

Coverage

Highlights

Reflected XSS: 2 prior fixes. Scrutinize any change in this area.

flow-server: most-fixed (3 issues). Treat as high-risk during review.

6 high-severity fixes in this history; regressions here are high-impact.

Recurring patterns

The bug types that recur here, drawn from past fixes, not open vulnerabilities.

Cross-Site Scripting (XSS): Unsafe handling of client-side execution contexts and dynamic URL schemes (such as javascript: and data: URIs) inside Anchor and Page APIs can allow attackers to inject malicious code. Manual JavaScript string assembly must be completely replaced by structured client-side bindings.

Reflected XSS: Components dealing with target links or frame sources (Anchor, IFrame, Page) are prone to DOM-based exploitation if user-supplied URLs are not systematically validated against a safe scheme allowlist prior to client-side injection.

Privilege Escalation: The use of highly privileged triggers such as pull_request_target on workflows executing untrusted code from fork pull requests allows attackers to compromise repository secrets and gain write access.