Is Tampermonkey Legacy safe?

Medium risk

Legitimate userscript manager with extensive permissions. PostMessage handlers lack origin validation which could allow malicious sites to inject content into pages.

Jan Biniokv5.1.1Chrome Web Store
0Risk

AI-generated. Findings may contain errors. Those marked Verified have been manually reviewed.

Publishers can request a review.

Updated 18 May 2026lcmhijbkigalmkeommnijlpobloojgfn